From @mail.uunet.ca:jaywon.pci.on.ca!sizone!sdavis@pci Sun Aug 1 05:08:24 1993
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Message-Id: <R50J8B2w165w@sizone.jaywon.pci.on.ca>
Date: Sat, 31 Jul 1993 12:54:02 -0400
Organization: SIZone, Soviet Recommunization Assoc., Toronto 416-YOU-SAW-BOB
From: sdavis@sizone.jaywon.pci.on.ca (Scott Davis)
To: fm-10@dg-rtp.dg.com
Subject: Slim Jim Experimentation..
I built myself a slim jim yesterday. It looks marvelous. I had the
thing hanging from string outside my house yesterday. A couple of
friends, neighbours and girlfriend all agree that it's the most
aestheticly pleasing antenna they've seen yet. <snicker> Actually, a
friend's little brother suggested I paint it zebra-stripe.
Anyhow, it seems to work about as well as my dinky dipole. I'm only
running at 70mW of power, so the ancient SWR that I borrowed from a CB
friend was unable to register anything.. once I build some of Mycal's
larger amps, I'll be able to tune it and let you all know what kind of
specs I am able to get out of it.
I have some construction suggestions for anyone thinking about making one
of these - simple things that could make life easier for anyone else
interested in making one. I've done no work with soldering copper pipe
before. I've watched it done a few times, so I didn't hesitate to whip
out a propane torch and begin hacking. Getting the correct angles of
"rotation?" at the 90 degree corners was a little bit of a slut. IE, the
3 inch gap was three inches, and 4 inches sideways at first. I solved
that problem by lying the assembled antenna on a flat, indestructable
surface (concrete floor in my basement) and letting the propane melt down
the solder connections again. Because the antenna was lying flat on the
surface of the floor, when it cooled, it formed a nice, even three inch
gap. (Melted the paint on the floor a little - pfft.) The sidewalk in
front of your house or apt. should serve the purpose of my basement floor
nicely, I imagine.
I wonder - about spacing. The three inch space between the two lengths
of element is a little vague. three inches from the outside of the pipe,
centre of the pipe, or inside side..? Ack! I just eyeballed it, and
prayed for the best. I need advice on this, I think. Anyone know
anything?
Peace All, please respond and let me know about your modifications to
this antenna and it's best operating setup!
Scott.
From @mail.uunet.ca:jaywon.pci.on.ca!sizone!sdavis@pci Sun Aug 1 05:00:12 1993
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Message-Id: <BRak8B3w165w@sizone.jaywon.pci.on.ca>
Date: Sat, 31 Jul 1993 13:07:34 -0400
Organization: SIZone, Soviet Recommunization Assoc., Toronto 416-YOU-SAW-BOB
From: sdavis@sizone.jaywon.pci.on.ca (Scott Davis)
To: fm-10@dg-rtp.dg.com
Subject: Mr. Dunnifer's Workshops.
I'm still debating the value of makign a trip to New York to see the
workshops from FRB. I'm interested only in the technichal aspects of the
workshop. Does anyone have any input about how useful the information
is..? I've been trying to call Stephen for a couple of days now. I hope
to reach him soon.
Scott..
From @CMUVM.CSV.CMICH.EDU:34I2NYW@CMUVM.CSV.CMICH.EDU Mon Aug 2 14:34:37 1993
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Date: Mon, 02 Aug 93 14:29:07 EDT
From: "Christopher M. Khoury" <34I2NYW@CMUVM.CSV.CMICH.EDU>
Organization: Central Michigan University
Subject: Steven's transmitter or FM10?
To: FM-10 Mailing List <fm-10@dg-rtp.dg.com>
Message-Id: <930802.142907.EDT.34I2NYW@CMUVM>
Hi everyone...
Well, i've come down to my final decision, it will either be Steven
Dunifer's 5 watt transmitter or the FM-10. ANy last minute advice??
I think Dunifer's seems to be a better deal, and he also says
it is a vast improvement over the FM10... in what way is it
imporved?? thanks
--chris
---------------------------
CHRISTOPHER KHOURY
34I2NYW@CMUVM.CSV.CMICH.EDU
---------------------------
From jmichael@vnet.IBM.COM Mon Aug 2 16:52:40 1993
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Date: Mon, 2 Aug 93 16:47:51 EDT
From: jmichael@vnet.IBM.COM
To: fm-10@dg-rtp.dg.com
Subject: Re: Mr. Dunnifer's workshops
You might consider videotaping these workshops. Many people may be
interested in the workshops, but unable to attend.
From cdimick@sim.es.com Mon Aug 2 17:20:19 1993
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From: cdimick@sim.es.com (Clint Dimick)
Message-Id: <9308022116.AA01240@sim.ES.COM>
Subject: Videotaping Workshops
To: fm-10@dg-rtp.dg.com
Date: Mon, 2 Aug 1993 15:16:17 -0600 (MDT)
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> From jmichael@vnet.IBM.COM Mon Aug 2 15:03:38 1993
> You might consider videotaping these workshops. Many people may be
> interested in the workshops, but unable to attend.
This sounds like an excellent idea. If the true purpose of this organiza-
tion is to disseminate the purpose of "micropower broadcasting" and the ease
with which is can be done, I don't see how Mr. Dunifer could refuse such an
offer. Maybe a final edited version could also be sold at minimal cost to also
help the donation pool.
On another note, has anyone ordered any kits from him yet? It's been about
two weeks, two e-mail msgs., and $5.00 with no response. Just curious to know
if parts need to be ordered, checks need to clear, etc.
- Clint
From miller@robin Tue Aug 3 12:07:36 1993
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From: miller@dg-rtp.dg.com (Mark T. Miller)
Message-Id: <9308031607.AA14817@robin>
To: fm-10@dg-rtp.rtp.dg.com
Subject: rec.radio.broadcasting #2421 - Right to communicate panel in NYC
And the follow-on posting. . .
In article <1993Aug2.025933.4653@gagme.chi.il.us>, resystom@web.apc.org (Bruce Girard) writes:
|>
|> Topic 365 Vinny Mohr @ Gui NLG Conv.
|> igc:pfranck amarc.general 6:19 pm Jul 22, 1993
|>
|> From: Peter Franck <pfranck>
|> Subject: Vinny Mohr @ Gui NLG Conv.
|>
|> /* Written 5:17 pm Jul 20, 1993 by pfranck@igc.apc.org in igc:nlg.interact */
|> /* ---------- "Comm on Demo Cmmncns Conv Panel" ---------- */
|> PANEL
|>
|> NLG COMMITTEE ON DEMOCRATIC COMMUNICATIONS
|>
|> Title: The Right to Communicate as a Basic Human Right in
|> the 90s and beyond.
|>
|> The Panel will be presented at Noon on Sunday the 8th
|> AMARC founding member Vinny Mohr will be a featured
|> panelist at the (US) National Lawyers Guild Convention
|> in New York. The Convention will be held at NYU
|> Aug 5-8. This panel is at noon on Sun the 8th.
|> All are invited.
|>
|>
|>
|> This Panel will focus on the emerging "Right to Communicate"
|> as a human right fundamental to democracy in the world of the
|> present and the future.
|>
|>
|> BACKGROUND:
|>
|> For more than 30 years there has been a major movement
|> throughout the world (but almost entirely blacked out by the U.S.
|> press) and originating in the Non Alighted Movement, for a "New
|> World Information and Communications Order."
|>
|> Commissioned by UNESCO, the 1980 Report of the MacBride
|> Commission (chaired by the distinguished Irish statesman Sean
|> MacBride) crystallized the notion of communications and cultural
|> sovereignty as basic human rights of all peoples.
|>
|> Today the Right to Communicate is essential to the grass
|> roots democratic mobilization of the world's peoples. That
|> mobilization is the world's only hope against the current rush to
|> the centralization of power in giant multinational corporations
|> and super-states (the European Community, NAFTA, etc.).
|>
|> The Presentation will be in three sub-panels, with question
|> time:
|>
|> Panel 1: Community Empowerment Through Radio: Steven
|> Dunifer, micro radio practitioner assessed $20,000 fine by FCC.
|> Lavinia Mohr, founder World Federation of Community Broadcasters.
|>
|> Panel 2: From Algiers to Dublin: The Struggle for an
|> Emerging Human Right. Dr. Fernando Reyes Mata, Chilean
|> delegation to the United Nations. Colleen Roach, author
|> Communication and Culture in War and Peace.
|>
|> Panel 3: Towards a New International Legal Standard: The
|> Right to Communicate. Alan Korn, author NLG brief on
|> constitutional Right to Micro Radio. Michelle Schwartz Board of
|> Directors of Human Rights Advocates.
|>
|>
|> The speakers:
|>
|> 1. Stephen Dunifer is a member of Free Radio Berkeley
|> and the Free Communications Coalition (FCC). Charged with micro
|> radio broadcasting without a license Dunifer has been assessed a
|> $20,000 fine by the Federal Communications Commission. He is
|> being represented by members of the NLG Committee on Democratic
|> Communications. Dunifer will speak on "Micro Radio, The Voice of
|> the People."
|>
|> 2. Lavinia (Vinny) Mohr is a founder of the World
|> Association of Community Radio Broadcasters (known by its French
|> acronym AMARC). AMARC is an international Non-Governmental
|> Organization based in Montreal composed of hundreds of member
|> community radio stations of all sizes worldwide. Ms. Mohr will
|> speak on Community Radio, the Right to Communicate and People's
|> Movements Around the World.
|>
|> 3. Dr. Fernando Reyes Mata is professor of
|> International Communications at the National University of Andres
|> Bello Chile, and a member of the Chilean delegation to the United
|> Nations. Dr. Mata played a leading role in the historic NWICO
|> Movement, having been present at the founding meeting in Algiers.
|> He will speak on The Right to Communicate at the End of the 20th
|> Century and Beyond.
|>
|> 4. Professor Colleen Roach is Professor of
|> Communications at Queens College, New York. A United Nations
|> representative of the International Organization of Journalists.
|> She will speak on the Emergence of the New Human Right Called the
|> Right to Communicate the People's Struggles for Self-
|> Determination.
|>
|> 5. Alan Korn is a 1993 graduate of Golden Gate Law
|> School is the author of the Committee on Democratic
|> Communications brief on the constitutional and international law
|> in validity on the ban on micro radio. He will speak on The
|> Constitutional Law Legal Basis for the Right to Communicate.
|>
|>
|> 6. Michelle Schwartz holds an LLM in International Law
|> from the London School of Economics. She is a member of the
|> Board of Directors of Human Rights Advocates, and Senior staff
|> attorney at National Heritage Institute. She has represented
|> NGOs before the Human Rights Commission in Geneva and has drafted
|> a human rights intervention on behalf of micro radio. Human
|> Rights Advocates is an NGO actively presenting human rights
|> violations to the UN subcommission on Human Rights in Geneva.
|> She will speak on The Development of The Right to Communicate
|> within the U.N. and NGO systems.
|>
|>
|> @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
|> @@ Bruce Girard : Email: resystom@web.apc.org ::
|> @@ 3575 blvd. St-Laurent, Suite 704 : Tel: +(514) 982-0351 ::
|> @@ Montreal, Quebec CANADA H2X 2T7 : Fax: +(514) 849-7129 ::
|> @@::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
|>
|>
|>
--
Mark T. Miller miller@dg-rtp.dg.com
...uunet!xyzzy!miller
From miller@robin Tue Aug 3 12:06:19 1993
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From: miller@dg-rtp.dg.com (Mark T. Miller)
Message-Id: <9308031606.AA14486@robin>
To: fm-10@dg-rtp.rtp.dg.com
Subject: rec.radio.broadcasting #2419 - Free Radio berkely, micro-radio and the FCC
Fowarded for your interest. . .
In article <1993Aug2.025912.4622@gagme.chi.il.us>, nyt@blyth.org (NY Transfer News) writes:
|> Via NY Transfer News Collective * All the News that Doesn't Fit
|>
|>
|> >From: stephenpd@aol.com
|> Date: Sat, 31 Jul 93 02:39:07 EDT
|>
|> For further information call:
|>
|> Louis Hiken, Attorney at Law, (415) 705-6460
|> Free Radio Berkeley (510) 464-3041
|>
|>
|> FCC'S ACTIONS AGAINST ALLEGED MICRO POWER BROADCASTER
|> CHALLENGED BY RECENTLY FILED LEGAL RESPONSE
|>
|> In response to the Notice of Apparent Liability, in the amount of
|> $20,000, brought by the Federal Communications Commission, against
|> Stephen Dunifer, a long-time activist and resident of Berkeley,
|> California, for allegedly broadcasting without a license, attorney
|> Louis Hiken has filed a 13-page response that refutes this action
|> by the FCC on the grounds that it is "unwarranted, procedurally
|> flawed, constitutionally invalid, and calls for a forfeiture
|> amount that is grossly disproportionate to the alleged violations
|> and which exceeds the maximum limits set by statute".
|>
|> Quoting further, "The Federal Communications Commission policies
|> with regards to micro radio broadcasting have failed to keep pace
|> with the rapid proliferation of technological advances in the
|> field of communications. The FCC's current regulatory scheme
|> completely prohibits micro radio broadcasters and their listeners
|> from accessing the public airwaves. To enforce this absolute
|> prohibition, the FCC is relying upon regulations which were
|> intended solely for application to large-scale, commercial
|> broadcasters, and which were promulgated long before the advent of
|> technology that makes possible micro radio; indeed, even before
|> the advent of FM broadcasting. The FCC's application of these
|> regulations violates the First Amendment rights of individuals
|> seeking to exercise those rights via methods and mediums that were
|> technologically impossible when the regulations were created."
|>
|> The fundamental problem is that the FCC has not provided
|> procedures by which micro radio broadcasters can become licensed
|> or authorized. Instead, the FCC is applying severe administrative
|> and criminal sanctions, intended for application to large-scale
|> operators, to micro radio broadcasters with the goal of completely
|> precluding all such broadcasts.
|>
|> As the named party by the FCC, Stephen Dunifer stated "This
|> recently filed response is an extremely clear and succinct defense
|> of micro power broadcasting. It is my hope that we can establish
|> a clear and binding legal precedent which will protect the
|> internationally recognized right of communication between
|> individuals and communities. In light of the FCC's pitiful ruling
|> that the Home Shopping Channel serves the public interest, it is
|> obvious the FCC is more interested in protecting the status quo of
|> commercial and corporate interests than actual public interests.
|> As the one dissenting FCC commissioner, Evin Duggan, put it -
|> 'Today, sadly. the commission puts forward a minimalist definition
|> of the public interest standard, at precisely the moment we should
|> be mending and refurbishing that tattered banner.' Despite the
|> most recent actions of the FCC, Free Radio Berkeley will continue
|> its weekly Sunday broadcasts as a community free speech project,
|> from 9 PM to 12 Midnight at 88.1 on the FM band. We will not be
|> silenced by federal agencies who hide behind a facade of serving
|> the public interest to mask their flagrant abuse of regulatory
|> power, public money and resources to defend, promote, and serve
|> private corporate media interests."
|>
|> Peter Franck, speaking for the National Lawyers Guild Committee on
|> Democratic Communications (NLGCDC), stated, "The NLGCDC has laid
|> the groundwork for the defense of Mr. Dunifer and Micro Radio
|> practitioners. The work of the CDC focuses on the rights of all
|> people to have a world-wide system of media and communications
|> based on the principle of cultural and informational
|> self-determination. Its research has led it to find that the
|> FCC's ban on low power community broadcasting violates both the US
|> Constitution and International Human Rights Law.
|>
|> Full length copies of the brief may be obtained by calling one of
|> the above numbers.
|>
|> On the weekend of August 6-8, the National Lawyers Guild will be
|> holding its national convention on the campus of NYU. As part of
|> that convention, on Sunday, August 8 there will be a special
|> panel, sponsored by the NLG Committee on Democratic
|> Communications, which will focus on the emerging "Right to
|> Communicate" as a human right fundamental to democracy in the
|> world of the present and the future.
|>
|> Stephen Dunifer, along with Lavinia Mohr, a founder of the World
|> Federation of Community Broadcasters (AMARC) will speak as part of
|> the first panel, of three, on "Community Empowerment Through
|> Radio."
|>
|> Two more panels are featured as well. "From Algiers to Dublin:
|> The Struggle for an Emerging Human Right" will include Dr.
|> Fernando Reyes Mata, Chilean delegation to the United States, and
|> Colleen Roach, author Communication and Culture in War and Peace.
|>
|> The third panel, "Towards a New International Legal Standard: The
|> Right to Communicate," will present Alan Korn, author of NLG brief
|> on Constitutional Right to Micro Radio and Michelle Schwartz,
|> Board of Directors of Human Rights Advocates
|>
|> Stephen Dunifer, as part of his trip to New York City, will be
|> leading workshops on micro power broadcasting - see following
|> flyer. These workshops will be oriented to imparting hands on
|> knowledge of radio broadcasting fundamentals including the
|> assembly of 5 watt FM transmitters which will be offered to
|> workshop participants as kits at a cost of $40 each. With an
|> assembled transmitter unit and a $100-$200 worth of audio gear,
|> cable and an antenna, any group or individual will be capable of
|> putting their own micro power station on the air. An output power
|> of 5 watts will, depending on conditions, project a 1 to 5 mile
|> radius of coverage.
|>
|> Paper Tiger Television will be hosting these workshops at their
|> offices on Saturday, August 7 from 11 am to 4 pm and Monday,
|> August 9 from 7 pm to 10 pm.
|>
|> Paper Tiger TV is located at 339 Lafayette Street in NYC. Phone
|> number is (212) 420-9045.
|>
|> Questions and inquiries regarding the National Lawyers Guild
|> Convention may be directed to the NLG New York office. Stephen
|> Dunifer may be contacted through the Paper Tiger office during his
|> stay in NYC. Press packets on micro power broadcasting and copies
|> of the legal response as well as the larger legal brief prepared
|> by the NLG Committee on Democratic Communications will be
|> available during that time.
|>
|> -30-
|>
|>
|> + Join Us! Support The NY Transfer News Collective +
|> + We deliver uncensored information to your mailbox! +
|> + Modem:718-448-2358 Fax:718-448-3423 E-mail: nyt@blythe.org +
|>
--
Mark T. Miller miller@dg-rtp.dg.com
...uunet!xyzzy!miller
From acsys!acsys!mycal@nntp.crl.com Thu Aug 5 20:19:35 1993
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Date: Thu, 05 Aug 1993 12:16:06 PDT
From: "Mycal" <mycal@NetAcsys.com>
Message-Id: <2c615c78.acsys@NetAcsys.com>
Organization: ACSYS, Inc.
To: fm-10@dg-rtp.dg.com
Subject: transistors
Yea,
I just got my misu transistors from dalbani. Look for a simple 500mw
1 stage amp for the FM-10 with filtering soon!
mycal
--
--------mycal@netacsys.com--------------------------------------------------
In the pure sciences, you are graded on how well you tell the truth.
In the pure liberal studies, you are graded on how well you can lie.
Everything in between is up for grabs.
From kors@netcom.com Thu Aug 5 21:15:45 1993
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From: kors@netcom.com (Richard Kors)
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Subject: add
To: fm-10@dg-rtp.dg.com
Date: Thu, 5 Aug 93 18:16:33 PDT
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Please ADD to your fm-10 mailing list.
Thanks
kors@netcom.com
--
From acsys!acsys!mycal@nntp.crl.com Mon Aug 9 22:12:08 1993
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Mon, 09 Aug 1993 09:38:07 PDT
Date: Mon, 09 Aug 1993 09:38:01 PDT
From: "Mycal" <mycal@NetAcsys.com>
Message-Id: <2c667d70.acsys@NetAcsys.com>
Organization: ACSYS, Inc.
To: fm-10@dg-rtp.dg.com
Subject: mycal update
IMPORTANT MICROPOWER UPDATE
===========================
There has been a little excitement on the ftp site this weekend. I uploaded
3 new and very exciting postscript files. They are in the ZIP format.
They are :
800mw amp from my packet
Powermeter/dummyload that uses a VOM
And a copy of the book Radio is my bomb (in ps and text).
Definatly worth a check out!
People can FTP into dg-rtp.dg.com with user "anonymous" and password
"<your EMail address>".
Files are in fm10\incomming
Since my net access is back up to par and I am done moving I have a bunch
more time and am hoping to work on finishing a bunch of micropower radio
projects. Also I will be uploading some more ps files.
The radio is my bomb book came from someone on the net, but I lost your
address, so thanx and it was perfect for the ftp site! Please mail me
again, I have some questions.
*****************************************************************
If you are using the mailing list please remeber that all add/delete
request go to a different address than the contributions. The addresses
are :
To send a message to the mailing list, send your question, reply, comment,
or contribution to :
fm-10@dg-rtp.dg.com
To add or delete yourself from the list, send a short message with
the function (add/delete/change address) along with the relevant e-mail
address to:
fm-10-request@dg-rtp.dg.com
*******************************************************************
I have been getting alot of questions about the Radio Free Berkeley kits.
No, I don't think they are a rip off.
I've talked to Stephen a bunch of times and traded designs etc. I wouldn't
think for a moment that he would rip anyone off.
The 5watt kit is a very sound design and much more stable than the FM-10,
you could even use a slightly modified ba1404 based kit for a stereo
generator for it.
I know he has the pcb's for the 5 watt kit, but I don't know about any of the
other kits he plans on.
Let me know if you have any problems with ordering on of the Radio Free
Berkeley kits.
************************************************
There has been some great stuph of late on the mailing list and the
alt.radio.pirate group. Keep it up! It looks like micropower radio
is about to explode.
I am working on a book, and I may soon send sections out for review. Also
I am in the middle of designing several low power <.5watt transmitters
that will be fool proof in design and provide very good harmonic suppression
(greater than 40db).
Liberty to all,
mycal
--
--------mycal@netacsys.com--------------------------------------------------
In the pure sciences, you are graded on how well you tell the truth.
In the pure liberal studies, you are graded on how well you can lie.
Everything in between is up for grabs.
From jkearman@arrl.org Tue Aug 10 09:48:53 1993
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Date: Tue, 10 Aug 93 14:52:07 GMT
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From: jkearman@arrl.org (Jim Kearman)
To: fm-10@dg-rtp.dg.com
Subject: FTP
I ftped to the dg-rtp.dg.com site, but couldn't find
anything that looked like "fm10/incomming." I looked
in several likely directories. What's up?
Jim
From jkearman@arrl.org Tue Aug 10 10:14:03 1993
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From: jkearman@arrl.org (Jim Kearman)
To: fm-10@dg-rtp.dg.com
Subject: Please disregard previous posting
"fm10" doesn't show up if you do a "dir" but
you can "cd" to it.
Jim
From dbrillha@dave.mis.semi.harris.com Tue Aug 10 13:47:50 1993
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From: dbrillha@dave.mis.semi.harris.com (Dave Brillhart)
Message-Id: <9308101747.AA28192@dave.mis.semi.harris.com>
Subject: zip format & UNIX
To: fm-10@dg-rtp.dg.com
Date: Tue, 10 Aug 1993 13:47:59 -0400 (EDT)
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I grabbed 3 files mycal recently put in fm10/incommng (binary ftp xfer
mode) and tried to "unzip" them. The two schematics produce PS files
that spit out about 20 pages of raw postscript on my SPARCprinter
(although the ghostscript previewer displays them okay on the
screen). The "radiomybomb" does not even unzip correctly. Any ideas?
It looks like the PS docs were generated on a PC - I'm running on
a DECstation running Ultrix.
Thanks,
-- Dave
160 -rw-r--r-- 1 dbrillha 150920 Aug 8 16:37 800mw.ps
27 -rw-r--r-- 1 dbrillha 27520 Aug 10 08:35 800mw.zip
36 -rw-r--r-- 1 dbrillha 36008 Aug 8 16:46 pmeter.ps
10 -rw-r--r-- 1 dbrillha 10112 Aug 10 08:35 pmeter.zip
0 -rw-r--r-- 1 dbrillha 0 Aug 10 08:38 pirate.ps
0 -rw-r--r-- 1 dbrillha 0 Aug 10 08:38 pirate.txt
0 -rw-r--r-- 1 dbrillha 0 Aug 10 08:38 radio.ps
0 -rw-r--r-- 1 dbrillha 0 Aug 10 08:38 radio.txt
240 -rw-r--r-- 1 dbrillha 236800 Aug 10 08:37 radiomybomb.zip
0 -rw-r--r-- 1 dbrillha 0 Aug 10 08:38 readme.1st
From jeffh@oakhill-csic.sps.mot.com Tue Aug 10 14:20:45 1993
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Date: Tue, 10 Aug 93 13:15:44 CDT
From: jeffh@oakhill-csic.sps.mot.com (Jeff Hunsinger)
Message-Id: <9308101815.AA17642@apache.sps.mot.com>
To: fm-10@dg-rtp.dg.com
Subject: Re: Postscript problems
You might want to load the postscript file into a text editor and make sure
the first two characters are %!
I noticed on the 800mw.ps file that there was a ^D before those two characters.
Deleting it got rid of the problem.
Jeff
From cdimick@sim.es.com Tue Aug 10 15:04:07 1993
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From: cdimick@sim.es.com (Clint Dimick)
Message-Id: <9308101859.AA01332@sim.ES.COM>
Subject: ZIP'd files on FTP Site
To: fm-10@dg-rtp.dg.com
Date: Tue, 10 Aug 1993 12:59:17 -0600 (MDT)
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> From dbrillha@dave.mis.semi.harris.com Tue Aug 10 12:00:27 1993
> Subject: zip format & UNIX
> Date: Tue, 10 Aug 1993 13:47:59 -0400 (EDT)
>
> I grabbed 3 files mycal recently put in fm10/incommng (binary ftp xfer
> mode) and tried to "unzip" them. The two schematics produce PS files
> that spit out about 20 pages of raw postscript on my SPARCprinter
> (although the ghostscript previewer displays them okay on the
> screen). The "radiomybomb" does not even unzip correctly. Any ideas?
> It looks like the PS docs were generated on a PC - I'm running on
> a DECstation running Ultrix.
Dave,
If you're still having problems I can PUT the raw files back on the FTP
site, if we have no objections from other people. The .ZIP file unpacked
fine on my PC.
- Clint
From dbrillha@dave.mis.semi.harris.com Tue Aug 10 15:30:41 1993
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From: dbrillha@dave.mis.semi.harris.com (Dave Brillhart)
Message-Id: <9308101930.AA28486@dave.mis.semi.harris.com>
Subject: Re: ZIP'd files on FTP Site
To: cdimick@sim.es.com (Clint Dimick)
Date: Tue, 10 Aug 1993 15:30:41 -0400 (EDT)
Cc: fm-10@dg-rtp.dg.com
In-Reply-To: <9308101859.AA01332@sim.ES.COM> from "Clint Dimick" at Aug 10, 93 12:59:17 pm
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Thanks to all who already replied.
It seems there are some ^D characters in the file - specifically
at the head & tail of the PS files. I have an old version of unzip,
which probably caused the problem.
# unzip -v
UnZip: Zipfile Extract v4.01 of 12-04-90; (C) 1989 Samuel H. Smith
Courtesy of: S.H.Smith and The Tool Shop BBS, (602) 279-2673.
-- Dave
According to Clint Dimick:
>
> Dave,
> If you're still having problems I can PUT the raw files back on the FTP
> site, if we have no objections from other people. The .ZIP file unpacked
> fine on my PC.
>
> - Clint
>
From danny@iastate.edu Tue Aug 10 16:18:02 1993
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To: fm-10@dg-rtp.dg.com
Subject: New Uploaded Files
Date: Tue, 10 Aug 93 15:17:49 CDT
From: "Dan Staedtler" <danny@iastate.edu>
I experienced the problem of trying to print the new schematics after
unziping them on a UNIX machine. The files have a carriage return/line
feed combination where UNIX only wants a line feed. Also the control-D
at the beginning and end of the file messed up the printer (mine just
didn't print). I just edited and transferred them to a PC to print them.
Also the "radiomybomb" documentation is formatted for A4 sized paper
and gets cut off if printed on regular 8.5x11". Luckly, I could print
them on legal size and cut them down.
Dan S.
danny@iastate.edu
From white@sleepy.ctstateu.edu Wed Aug 11 02:00:23 1993
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Date: Wed, 11 Aug 93 00:46:08 -0400
From: white@sleepy.ctstateu.edu (Harry White)
Message-Id: <9308110446.AA14714@sleepy.ctstateu.edu>
To: fm-10@dg-rtp.dg.com
Subject: FRB kit & Panaxis SG?
Hi all
Can the Panaxis SG Stereo Generator be used with the 5W FRB kit? Would
the SG output connect directly to the audio input of the FRB?
Thx
Harry
From acsys!acsys!mycal@nntp.crl.com Wed Aug 11 09:17:45 1993
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Tue, 10 Aug 1993 21:35:19 PDT
Date: Tue, 10 Aug 1993 21:35:18 PDT
From: "Mycal" <mycal@NetAcsys.com>
Message-Id: <2c687707.acsys@NetAcsys.com>
Organization: ACSYS, Inc.
To: fm-10@dg-rtp.dg.com
Subject: files and stuph
Yes yes yes, get rid of the ^d in the ps files if your not on ms-dos.
Radio is my bomb probibly doesn't have this problem, though it was done
with the new zip. version 1.1 which alot of ppl are still using won't work.
I just wanted to get the files up there, and I don't have a unix or apple
to test with so you guys are going to have to bear with me. I have alot
more stuph to upload and not alot of time to mess with it, so someone else
can fix the files and re-upload them.
I hope the info is usefull, it looks like we are starting to have a pretty
good archive going.
mycal
--
--------mycal@netacsys.com--------------------------------------------------
In the pure sciences, you are graded on how well you tell the truth.
In the pure liberal studies, you are graded on how well you can lie.
Everything in between is up for grabs.
From mrapple@quack.kfu.com Mon Aug 16 11:40:40 1993
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Date: Mon, 16 Aug 1993 08:40:33 -0700
From: Nick Sayer <mrapple@quack.kfu.com>
Message-Id: <199308161540.AA23339@quack.kfu.com>
To: fm-10@dg-rtp.dg.com
Subject: Mods and enhancements
I've scraped out the ftp site and think I'll build the 350 mw
amp and add the 38 kHz crystal, but there are some other things
I want to do and I wonder if anyone can steer me in the right direction:
1. Crystalized, PLLed, or DSSed transmit frequency selection (the
stuff I FTPed seems to suggest that this isn't possible)
2. Limiters
3. A Modulation meter
From BEW4568@RIGEL.TAMU.EDU Mon Aug 16 22:41:45 1993
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Date: Mon, 16 Aug 1993 11:15:57 -0500 (CDT)
From: "Bruce E." <BEW4568@RIGEL.TAMU.EDU>
To: fm-10@dg-rtp.dg.com
Message-Id: <930816111557.21a02c6c@RIGEL.TAMU.EDU>
Subject: audio input signal conditioning
Well, from my experience with the fm-10, a couple things are necessary
to condition the signal before it is sent to the ba1401 chip:
1) the frequency must be limited to below 16 kHz. Any signals higher
than this start mixing with the pilot and mess up the broadcast signal,
adding sibilance.
2) Audio level limiting. I've had a lot of trouble running my CD player
into my fm-10 because the loud peaks distort, and the low-level audio
is full of noise. Anyone know of a circuit that has variable limiting?
Limiting that won't make the pauses between songs sound like a river?
3) The proper preemphasis filter. This is kinda variable because I'm
still not sure what the real impedances are on either side of the filter.
Any ideas about these wo9uld be welcomed.
Bruce
From froula@red.rtsg.mot.com Tue Aug 17 10:19:02 1993
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Date: Tue, 17 Aug 93 09:18:46 CDT
From: froula@red.rtsg.mot.com (Don Froula)
Message-Id: <9308171418@royal13>
To: fm-10@dg-rtp.dg.com
Subject: Free Ramsey FM-10 Upgrade
I'm not sure if it is widely known yet, but Ramsey is offering a free
38Khz crystal mod kit for those who are experiencing the stereo
separation problem that has been reported here recently. Apparently the R-C
network used in the kit does not provide the correct phase relationship
in the newer runs of the BA1404 chip. The article from which this info
came is included below. I called, and they immediately offered to send
me the crystal and instructions free of charge.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Ramsey has released a modification kit for the FM-10 which puts in a
38-kHz crystal in place of the original RC timing network for the 38-kHz
oscillator.
They say that with recent production runs of the BA1404, the RC network
no longer produces the correct _phasing_ of the 38-kHz signal, even though
the frequency is correct (when properly adjusted).
The symptom is poor stereo separation. The kit cures it.
They gave me my mod. kit free, but I don't know if that is the general
policy.
--
:- Michael A. Covington, Associate Research Scientist : *****
:- Artificial Intelligence Programs mcovingt@ai.uga.edu : *********
:- The University of Georgia phone 706 542-0358 : * * *
:- Athens, Georgia 30602-7415 U.S.A. amateur radio N4TMI : ** *** ** <><
From acsys!acsys!mycal@nntp.crl.com Tue Aug 17 12:32:46 1993
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Tue, 17 Aug 1993 08:49:23 PDT
Date: Tue, 17 Aug 1993 08:48:53 PDT
From: "Mycal" <mycal@NetAcsys.com>
Message-Id: <2c70fe04.acsys@NetAcsys.com>
Organization: ACSYS, Inc.
To: "Nick Sayer" <mrapple@quack.kfu.com>
Cc: fm-10@dg-rtp.dg.com
Subject: Re: Mods and enhancements
On Mon, 16 Aug 1993 08:40:33 -0700, "Nick Sayer" <mrapple@quack.kfu.com> wrote:
> I've scraped out the ftp site and think I'll build the 350 mw
> amp and add the 38 kHz crystal, but there are some other things
> I want to do and I wonder if anyone can steer me in the right direction:
>
> 1. Crystalized, PLLed, or DSSed transmit frequency selection (the
> stuff I FTPed seems to suggest that this isn't possible)
A couple of us out here have'em (PLL's). Once I get time I'm going put
the final PLL stuph togeather for distribution. Also I see no problem
with xtal transmitters, there just a bit tricky to get enough deviation
for stereo modulation, or you have to use frequency multiplication.
>
> 2. Limiters
>
I'm in need of a good design too!
> 3. A Modulation meter
>
This would also be cool, how would one do this for FM?
mycal
--
--------mycal@netacsys.com--------------------------------------------------
The metaphor is the meaning
From fylz!fyl@nwnexus.wa.com Wed Aug 18 17:06:42 1993
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id AA15987; Wed, 18 Aug 93 13:54:37 19
Subject: Deviation Meters
To: fm-10@dg-rtp.dg.com
Date: Wed, 18 Aug 93 13:54:33 PDT
X-Mailer: ELM [version 2.2 PL15]
From: fyl@fylz.com (Phil Hughes)
Message-Id: <9308181354.AA15985@fylz.com>
> On Mon, 16 Aug 1993 08:40:33 -0700, "Nick Sayer" <mrapple@quack.kfu.com> wrote:
And Mycal responded:
...
> > but there are some other things
> > I want to do and I wonder if anyone can steer me in the right direction:
> > 2. Limiters
> >
> I'm in need of a good design too!
I have been thinking about this one. What you reall want is a
compressor.
> > 3. A Modulation meter
> >
> This would also be cool, how would one do this for FM?
If you settle for checking the deviation on something where you have
control over the transmitter all you need to do is measure the
amplitude of the audio output of a receiver. In other words, if you
put a 1KHz tone into your transmitter and adjust its amplitude the AC
voltage on the speaker terminals of your receiver will be proportional
to your variation of the input amplitude. The only trick is
calibration.
I believe there is a design for a simple deviation meter in the ARRL
handbook. I was going to build it over 25 years ago (when I first got
involved in FM -- as in 2 meters and up) but never did. I eventually
bought a Heathkit deviation meter which is a tunable receiver and a
detector.
Here is the story on the Heathkit. It consists of a converter which
hetrodynes the incoming signal with a local oscillator running 200KHz
away (above or below -- it doesn't matter) from the incoming signal.
This resulting IF is amplified, limited and converted to pulses.
These pulses are then low-pass filtered. At this point you
essentially have the detected signal and it is amplified to feed a
speaker. This same signal is also peak detected and this drives the
meter.
Ok, that was quick and fairly complicated. But it is also a serious
piece of test equipment with accurate calibration. It also is full of
transistors and integrated circuits as it was designed about 15 years
ago. So I went on a search for "Plan B".
Plan B lead me to the RSGB VHF/UHF handbook. They have a deviation
meter plan using a CA3089E IC that is designed to connect to a 10.7MHz
IF (the common IF frequency for FM broadcast receivers). It was
designed for narrow band FM but I suspect it will work on wider
bandwidths as well.
A comment on this manual. It is worth the $30 it costs if
semi-techincal stuff is within your grasp. The version I have is from
1983 but I think it is still current. (ISBN 0 900512 63 0) I find it
much better than ARRL (or any other US books) on VHF communications.
Good theory coverage, lots of construction projects with enough detail
to make them possible to build and, as a bonus, there is a 72MHz ham
band in England so there are some "almost 3 meter" circuits. The one
negative about the book is that there are more valve (that's vacuum
tube in British :-) ) circuits that I think are necessary. I was
hoping there would be a new edition soon that was a little more modern
but the assortment of decent solid state circuits and passive things
like filters still make the book a good buy.
--
Phil Hughes - FYL - 8315 Lk City Wy NE - Suite 207 - Seattle, WA 98115
Phone: 206-526-2919 x74 Fax: 526-0803
E-mail: fyl@fylz.com or nwnexus!fylz!fyl
From heller@ai.sri.com Wed Aug 18 21:32:39 1993
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Date: Wed, 18 Aug 93 18:32:39 PDT
From: Aaron Heller <heller@ai.sri.com>
Message-Id: <9308190132.AA09788@Monterey.AI.SRI.COM>
To: fyl@fylz.com
Cc: fm-10@dg-rtp.dg.com
In-Reply-To: <9308181354.AA15985@fylz.com>
Subject: Deviation Meters
Date: Wed, 18 Aug 93 13:54:33 PDT
From: fyl@fylz.com (Phil Hughes)
> On Mon, 16 Aug 1993 08:40:33 -0700, "Nick Sayer" <mrapple@quack.kfu.com> wrote: And Mycal respod:
> > 3. A Modulation meter
> > > This would also be cool, how would one do this for FM?
If you settle for checking the deviation on something where you
have control over the transmitter all you need to do is measure the
amplitude of the audio output of a receiver. In other words, if
you put a 1KHz tone into your transmitter and adjust its amplitude
the AC voltage on the speaker terminals of your receiver will be
proportional to your variation of the input amplitude. The only
trick is calibration.
Well, yes and no.
You can use a standard FM receiver, but you must measure the peak
level of the composite stereo signal before the stereo decoder and
de-emphasis circuits. An old tuner that has a separate output for a
stereo or quad decoder is perfect. The only circuit you'd need to
contruct is a precision rectifier and a peak-hold circuit. Almost any
IC op-amp handbook will have designs for these.
To calibrate it (or any FM deviation monitor) you use a procedure
which is called a Bessel null. It is based on the theory that if you
frequency modulate a carrier with a single pure sine wave, at certain
modulation indices (def.: the ratio of the carrier deviation to the
modulating frequency) all of the power is contained in the sidebands
and none in the carrier. The critcal values of the modulation indices
correspond to zeros of the Bessel function of the first kind of order
zero. Hence the name, Bessel null.
I can describe the full procedure here if anyone is interested.
Aaron Heller (heller@ai.sri.com)
From ac700@medina.CWRU.Edu Wed Aug 18 22:18:13 1993
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Date: Wed, 18 Aug 93 22:15:12 -0400
From: ac700@medina.CWRU.Edu (Aaron M. Barnes)
To: fm-10@dg-rtp.dg.com
Subject: Stereo Trans for sale
Reply-To: ac700@medina.CWRU.Edu
Hello.
I have a completed DC kits SMF-II transmitter here I dont use.
It has a 38kHz x-tal which provides great separation and stabilit
y.
It is a great little device, but dont expect to cover half the ci
ty or, half a mile for that matter.Just add a little output amp
and you would have a great station.
It includes a large instruction/specification manual.
Will take best offer.
--
Aaron Barnes
ac700@medina.freenet.edu
Catch blacked-out Browns games on WPXI-TV 11,Pittsburgh,WICU-TV 12,Erie,or WTVG-TV 13,Toledo.All youed is a large(at least 13feet)antenna and a good sign
From wdp@gagme.chi.il.us Thu Aug 19 04:05:06 1993
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From: wdp@gagme.chi.il.us (Bill Pfeiffer)
Subject: Re: Deviation Meters
To: heller@ai.sri.com (Aaron Heller)
Date: Thu, 19 Aug 1993 01:50:48 -0500 (CDT)
Cc: fm-10@dg-rtp.dg.com
In-Reply-To: <9308190132.AA09788@Monterey.AI.SRI.COM> from "Aaron Heller" at Aug 18, 93 06:32:39 pm
X-Mailer: ELM [version 2.4 PL21]
Content-Type: text
Content-Length: 8994
} Aaron Heller (heller@ai.sri.com) writes...
[regarding a modulation meter circuit]
} I can describe the full procedure here if anyone is interested.
Actually, I wish you would. In fact I wish you (and other
knowlegable folks) would go further.
I read and read about these kits going on the air and how to construct
bigger amps and such and I also read a lot of people planning to go
on-the-air and asking the sort of elementary questions that indicate
that they have no idea in hell about what they are undertaking and the
consequences.
Basically, I support micro-radio. I have gone to the mat with several
regular posters to my group (see sig below) on the subject. Many of
the posters feel that micro-radio is just a bunch of children wanting
to play 'sandbox radio' and putting signals on-the-air that are
splattery and way out of specs with other broadcasters. They contend
that most so-called pirates could not care less about the effects of
going on the air in a crowded band, and that most have no technical
backgrounds <or desire to learn one> and are little more than 'CB
types' who are now invading the legitimate broadcast bands.
I have disagreed with these posters, saying that micro-radio is a
viable service, provided that certain technical (not programming) standards
are met.
I would like to see more emphasis placed on the use of these filters,
deviation meters, limiters and other things to bring micro-radio out
of the sandbox and place it on a par with higher-powered broadcasters,
thus making it something to be sought after, not feared and rejected.
However, I see precious little said about keeping a clean, well
modulated signal, and more than enough said about **HIGHER POWER**.
When I do see mention made of clean signals, it is discussed in the
context of 'not getting caught' instead of a pride in operating a
decent station.
Ham radio entusiasts have long known that it is not how much power you
have, it is what you do with that power. In fact many hams
deliberately use flea-powered rigs to see how much they can get out of
them using creative antennas.
This is the problem that plagued CB and turned it into a virtual
wasteland. Everyone wanted MORE DAMNED POWER and screw everyone else.
I would HATE to see the same immature, ego-driven mess proliferate on
the broadcast bands (shit, there is already enough of a mess from all
of the big guys :->).
What I would like to see is people like you, Aaron, and Mycal and
others with a great technical ability, create a 'total package'
micro-radio kit ensamble with a deviation and modulation meter, output
meters and such, as well as a compression circuit and whatever is
needed to create a nice sounding micro-radio signal without
interfering with other broadcasters.
Then I would like to see someone step out in front of the pack and
explain that if micro-radio is ever to get respect, ever to become
legal, ever to become more than some childish dream of playing
kiddie-pirate-sandbox-ego-radio, then those involved must
self-regulate and earn that respect.
Of course there will always be the 'angry-young-(wo)men' who LIKE the
outlaw image, and the illusion of 'living on the edge' with pirate
radio and that's fine. But unfortunately, those are the fools who are
giving micro-radio a bad name and incuring the wrath, not only of the
FCC <that is to be expected> but of other broadcasters who *could* be
allies in the struggle, but who see micro-radio practitioners as
crybabies who dont give a shit about anyone but themselves and their
own ego gratification.
There are many very sincere people who are drawn to micro-radio. Many
creative people find expression through this exciting medium. I
wholeheartedly support them and wish them success. Sad that they are
running a serious risk of legal trouble which is way out of proportion
to what they are trying to do.
So what is needed is direction. Some leadership, some reality checks.
What is needed is to create a micro-radio movement that is not so much
'pirate-driven' <that implies that you are stealing something> and
more 'people-driven'. I submit that we stop using the term 'pirate
radio' altogether and adopt 'micro-radio' or 'micro-braodcasting'.
These terms are already in use and conjure up a much more positive
image than pirate-radio does.
OK, Call me Sentimental
I envision a legal, low-powered (1 to 5 watt) micro-radio class of
license that could be obtained at no (or very low) cost, provided that
some minimal technical understandings were demonstrated. I then
envision *real* broadcast equipment made available at a reasonable cost
which might include everything from stand-alone transmitters (with
proper metering and tuning features) to entire ensembles including
mixers, cd/turntable/cassette decks integrated.
I see small networks of these stations banding together to offer
regional coverage, alternative news and music sources, community
announcements, whatever. I envision micro-radio as the next big
frontier in broadcasting, offering more people opportunities to become
aquainted with the *reality* of operating a station. Gaining
experince, honing their skills, expressing their creativity, and
best-of-all **NOT** breaking any laws doing so. Provided they stay
within the bounds of the license agreement (just like commercial
stations must do) these stations would be free from "busts" and could
advertize (and carry advertizing if they chose to).
Would that not be WAY COOL?
But it will never happen as long as micro-radio is seen by the rest of
the broadcasting community as an excersise in splatterbox annoyance
and childish ego games. We gotta re-think our approach. Perhaps a
little less "in-your-face" and a little more "Use-Your-Head".
Whenever someone comes 'in-someones-face' the first reaction of that
person is to say "get the FU*K out of my face". Your message is lost
because you have the other person on the defensive. He is not hearing
you, because your approach is hostile. Many pirates fall into that
catagory.
Radio-Free-Berkely and others are fighting the battle for micro-radio
now. They are putting their asses on the line and spending BIG BUX to
pave the way for you and I to engage in what might become the 'next
big adventure in broadcasting'. The FCC is covering the ass of BIG
BROADCAST BUSINESS, who <no doubt> fears micro-radio as an intrusion
into their monopoly. If we, the people, are to overcome this fear
and loathing, we gotta have our act totally together.
This means CLEAN, well modulated signals. Adhereing to the same
<or greater> technical standards as our higher-power brothers <believe
me, they will make better friends than enemies>, and conducting
ourselves as professonals, not idiots. This also means not stepping
on other services, making damned sure that we have a clean channel
before we go on the air <and that means more than tuning our walkman
until we find a quiet spot, and adjusting our transmitters to that
spot>, and that we have at least one channel seperation from the
nearest signal. It means understanding the technical realities of
what we plan to do. And it will mean cooperating with others on the
band.
I submit that if you cannot build and adjust an FM-10 or FRB kit on
your own, and understand what you are doing, you should probably not
be doing it. I am sure I'll get flamed for this statement by those
sincere folks who just have had trouble geting the kit up-and-running,
but there is so much more at stake here than that. You carry a big
responsibility when you decide to operate a radio station with more
than a block range.
I do support the sharing of information among micro-radio enthusiasts,
but I would suggest that that sharing be in the form of actual
'teaching' rather than just problem solving. In other words instead
of saying "..solder c4 to ground.." tell the questioner WHY you solder
c4 to ground. After all, one of the big potential values of
micro-radio is to learn.
Anyway, I've rambled enough.
I hope what I have said has fallen on receptive ears, because without
some foresight into the future, micro-radio will become nothing more
than a flash-in-the-pan for pseudo-rebels and will continue to be
crushed by the big hammer of the FCC whenever it is discovered.
However, if we can get it together and re-think our strategy, who knows
what might happen...
I welcome anyone who wants to, to write and start a dialogue, either
here on the list, or in email.
Keep the air alive!
Bill
--
____________________________________________________________________________
William Pfeiffer - Moderator | Radio is a sad salvation, |
rec.radio.broadcasting - Internet Radio Journal | Radio is cleanin' up the |
Article Submission - rrb@airwaves.chi.il.us | nation. |
Subscription Desk - journal@airwaves.chi.il.us | 'That's the biz - baby!' |
-----------------------------------------------------------------------------
From @mail.uunet.ca:jaywon.pci.on.ca!sizone!sdavis@pci Thu Aug 19 13:46:04 1993
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Date: Thu, 19 Aug 1993 11:39:12 -0400
Organization: SIZone, Soviet Recommunization Assoc., Toronto 416-YOU-SAW-BOB
From: sdavis@sizone.jaywon.pci.on.ca (Scott Davis)
To: fm-10@dg-rtp.dg.com
Subject: FM-10 Crystal Mod's
I just got off the phone with Ramsey -- they're mailing me some mod kit
for my FM-10. I suspect it'll be the crystal mod that was mentioned by
someone else. Finally, my nightmares about stereo seperation are over.
<grin> I was really peeved about the FM-10 kit in general, but if this
mod fixes the seperation problem, and allows me to give the little
beastie enough input for some kind of realistic sound output, I might be
happy.. I had scrapped the kit to the junk heap for a couple of weeks,
but I've renewed my interest. Placed an order from mouser today - which
I hope will arrive before the middle of next week so's I can get Mycal's
800mW amp up, my filter and begin learning how to tune the sucker more
precisely.
Peace All, and thanks for the help!
Scott.
From stlucas@gdwest.gd.com Thu Aug 19 17:06:00 1993
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From: stlucas@gdwest.gd.com (Joseph St. Lucas)
Message-Id: <9308192103.AA17747@gdwest.gd.com>
Subject: mrf901s
To: fm-10@dg-rtp.dg.com
Date: Thu, 19 Aug 93 14:03:32 PDT
X-Mailer: ELM [version 2.3 PL11]
I thought I'd try to build the 350mw amp for my fm10, and ordered the
two mrf901s from DC Electronics, along with a bunch of other stuff.
Of course, the only things that were backordered were the two transistors
I needed, and b.o.'ed until NOVEMBER??? Is there somewhere else I can get
these things w/o a huge post/handling charge? Is there such a demand that
they can be backordered for four months? Darn it all.
Joe St.Lucas stlucas@gdwest.gd.com Standard Disclaimers Apply
General Dynamics Space Systems, San Diego
My blood runs Husker red.
From zben@ni.umd.edu Fri Aug 20 13:54:57 1993
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Date: Fri, 20 August 1993 13:51:03 -0500
From: Charles B Cranston <zben@ni.umd.edu>
To: stlucas@gdwest.gd.com (Joseph St. Lucas)
Subject: Re: mrf901s
Cc: fm-10@dg-rtp.dg.com
Message-Id: <Mailstrom.1.02b2.34631.-3114.zben@ni.umd.edu>
In-Reply-To: Your message <9308192103.AA17747@gdwest.gd.com> of Thu, 19 Aug
93 14:03:32 PDT
Content-Type: TEXT/plain; charset=US-ASCII
The MCM catalog lists mrf901s at $3.81 for one to four and
$3.28 for five to nine. I don't know if they have them in
stock, their number is 1-800-543-4330 and they have all
KINDS of neat goodies. Shipping is "chart rate" plus an
additional $2.25 shipping and handling, but they do have
a $20.00 minimum order (not counting shipping and handling).
Digi-Key doesn't list it at all.
I suspect if Newark carries them it will be about the same
as MCM or worse, I'm pretty sure they have a minumum $20.00
order policy also.
How much is "huge" for a p/h charge? When you send payment
with the order DigiKey eats the handling. I have to check
my records to find out what they are charging me for shipping.
After looking at the paperwork of my last three DigiKey orders
it seems like for credit card purchases they add it to the
amount charged so it will appear as the differance between my
order paperwork and the actual credit card charge. Good thing
I type my credit card details into a split Quicken transaction,
so I still have this info broken out...
From froula@red.rtsg.mot.com Fri Aug 20 14:45:00 1993
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Date: Fri, 20 Aug 93 13:44:44 CDT
From: froula@red.rtsg.mot.com (Don Froula)
Message-Id: <9308201844@royal13>
To: fm-10@dg-rtp.dg.com
Subject: Ramsey Crystal Mod Kit for FM-10
I received my FM-10 modification kit from Ramsey
yesterday. It consisted of a VERY small crystal
in a tubular package (similar to a watch or
clock crystal), 2 10pf disc capacitors and
2 resistors. The mod consisted of removing
the variable and fixed pilot frequency
caps, replacing these with the crystal, cutting a trace,
bridging the trace with on 10pf cap, connecting
the second cap from pin 5 to ground (RF bypassing?),
and replacing two resistors. I also took the opportunity
to replace the two pre-emphasis resistors to the
75K values for the US standard.
Everything worked great the first time. The stereo
pilot frequency is dead-on.
One warning is in order. Be very carefully not to
break the leads of the crystal while bending them to fit
the PC board holes. They are very delicate!
Also, the change in pre-emphasis makes the unit
sound much better, especially into the bass end.
Not bad for a free upgrade!
From kendelm@GAS.uug.Arizona.EDU Fri Aug 20 19:30:31 1993
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Date: Fri, 20 Aug 93 16:30:25 MST
From: kendelm@GAS.uug.Arizona.EDU (kendel m mccarley)
Message-Id: <9308202330.AA13098@GAS.uug.Arizona.EDU>
To: fm-10@dg-rtp.dg.com
Subject: phillips databook stuff
I finally got the Phillips RF Power semi-conductor databook that
I'd ordered almost a month ago. It has oodles of "test circuits"
for their various products for the FM broadcast band (including the
200W design I told you about, Clint). I think this stuff comes out
of their Dutch factory. Anyhow, the databook is a how-to for
fm amps and I got mine free just by calling and asking.
From acsys!acsys!mycal@nntp.crl.com Fri Aug 20 21:17:36 1993
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Fri, 20 Aug 1993 12:11:31 PDT
Date: Fri, 20 Aug 1993 12:11:28 PDT
From: "Mycal" <mycal@NetAcsys.com>
Message-Id: <2c7521e5.acsys@NetAcsys.com>
Organization: ACSYS, Inc.
To: fm-10@dg-rtp.dg.com
Subject: Micro Power Radio Contest
Also posted in alt.radio.pirate
I am holding a contest for ideas on a good logo to represent Micro Power
Radio for my book.
The prize is a free book of course, and a mention (if you want) of where
the idea came from.
Right now my idea is to use the Statue of Liberty radiating radio waves.
We could have a net vote, but I'd reserve the right to use the one I wanted.
I'd probibly have to give two books away then :)
mycal
ps. I know the statue is an american thing but what it represents is a
liberty thing.
--------mycal@netacsys.com--------------------------------------------------
Newmerica is here and will operate on two basic fundimentals :
1) Make every thing illegal
2) Enforce as needed
Any Questions?
--
--------mycal@netacsys.com--------------------------------------------------
Newmerica is here and will operate on two basic fundimentals :
1) Make every thing illegal
2) Enforce as needed
Any Questions?
From acsys!acsys!mycal@nntp.crl.com Sat Aug 21 09:17:45 1993
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Fri, 20 Aug 1993 21:43:23 PDT
Date: Fri, 20 Aug 1993 21:43:05 PDT
From: "Mycal" <mycal@NetAcsys.com>
Message-Id: <2c75a7ed.acsys@NetAcsys.com>
Organization: ACSYS, Inc.
To: "Charles B Cranston" <zben@ni.umd.edu>
Cc: fm-10@dg-rtp.dg.com
Subject: Re: mrf901s
On Fri, 20 August 1993 13:51:03 -0500, "Charles B Cranston" <zben@ni.umd.edu> wrote:
> The MCM catalog lists mrf901s at $3.81 for one to four and
> $3.28 for five to nine. I don't know if they have them in
> stock, their number is 1-800-543-4330 and they have all
> KINDS of neat goodies. Shipping is "chart rate" plus an
> additional $2.25 shipping and handling, but they do have
> a $20.00 minimum order (not counting shipping and handling).
you shouldn't have to pay more than $1 for each, check rfparts or
dalbani. HSC sell mps901's for $.20, different case same transistor
mycal
--
--------mycal@netacsys.com--------------------------------------------------
Newmerica is here and will operate on two basic fundimentals :
1) Make every thing illegal
2) Enforce as needed
Any Questions?
From white@sleepy.ctstateu.edu Sat Aug 21 11:13:58 1993
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Date: Sat, 21 Aug 93 11:17:43 -0400
From: white@sleepy.ctstateu.edu (Harry White)
Message-Id: <9308211517.AA17372@sleepy.ctstateu.edu>
To: fm-10@dg-rtp.dg.com, kendelm@gas.uug.arizona.edu
Subject: Re: phillips databook stuff
Kendel
Can you post the Phillips address/phone number?
-harry
From zben@ni.umd.edu Sat Aug 21 15:47:59 1993
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Date: Sat, 21 August 1993 15:47:49 -0500
From: Charles B Cranston <zben@ni.umd.edu>
To: "Mycal" <mycal@netacsys.com>
Subject: Re: NewMerica (was Micro Power Radio Contest)
Cc: fm-10@dg-rtp.dg.com
Message-Id: <Mailstrom.1.02b2.62501.15089.zben@ni.umd.edu>
In-Reply-To: Your message <2c7521e5.acsys@NetAcsys.com> of Fri, 20 Aug 1993
12:11:28 PDT
Content-Type: TEXT/plain; charset=US-ASCII
> Newmerica is here and will operate on two basic fundimentals :
> 1) Make every thing illegal
> 2) Enforce as needed
In the same way that the modern American corporate culture
of "plausable deniability" and posterior covering generates the
environment of "it is easier to get forgiveness than permission",
the corporate culture of power and control generates this
environment where people actually have no inherent rights
("make everything illegal") so getting *ANYTHING* done requires
the intervention of one of the wielders of power and control
("enforce as needed") and thus becoming co-opted by them.
This just goes to prove just how innovative the American
founding fathers were to postulate "inherent rights", and the
degree to which we have frittered away those rights in this
century. Not to mention FDR giving us all numbers and making
us register with a federal bureaucracy...
From white@sleepy.ctstateu.edu Sat Aug 21 17:41:13 1993
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Date: Sat, 21 Aug 93 17:44:58 -0400
From: white@sleepy.ctstateu.edu (Harry White)
Message-Id: <9308212144.AA17511@sleepy.ctstateu.edu>
To: fm-10@dg-rtp.dg.com
Subject: RS has a new FreqCounter
Hey FM-10ers...
I just saw the new RadioShack catalog today (they now want $3 for it) and they
have a new frequency counter (1MHz---> well past the FM broadcast band). The
price was $100. My local store did not have it yet. FYI.
Peace
Harry
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Message-Id: <q6NN9B2w165w@sizone.jaywon.pci.on.ca>
Date: Sat, 21 Aug 1993 19:23:25 -0400
In-Reply-To: <2c7521e5.acsys@NetAcsys.com>
Organization: SIZone, Soviet Recommunization Assoc., Toronto 416-YOU-SAW-BOB
From: sdavis@sizone.jaywon.pci.on.ca (Scott Davis)
To: "Mycal" <mycal@NetAcsys.com>
Cc: fm-10@dg-rtp.dg.com
Subject: Re: Micro Power Radio Contest
> Right now my idea is to use the Statue of Liberty radiating radio waves.
>
> We could have a net vote, but I'd reserve the right to use the one I wanted.
> I'd probibly have to give two books away then :)
My humble (Canadian) opinion is that the Statue of Liberty dosen't
really represent Liberty at all - it is a silly symbol that's been
corrupted. There's little liberty in amerikkka at all, as far as I can
see - but that's not what this message is about. Just keep the american
symbols and imagery outta the book, is what I'd like to say. Maybe a
stylised antenna or some such other dorky symbol could be used..?
Scott.
From white@sleepy.ctstateu.edu Sun Aug 22 09:26:29 1993
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Date: Sun, 22 Aug 93 09:30:13 -0400
From: white@sleepy.ctstateu.edu (Harry White)
Message-Id: <9308221330.AA17822@sleepy.ctstateu.edu>
To: fm-10@dg-rtp.dg.com
Subject: Panaxis 5W Plans
I have the plans for a "Quicky Circuit - 5 Watt FM Transmitter" that
appears to be from Panaxis; it is closely related to the FRB design. I'm
considering building it, and would appreciate comments from anyone who
has seen the plans or built this device.
Thanks
Harry
From @CMUVM.CSV.CMICH.EDU:34I2NYW@CMUVM.CSV.CMICH.EDU Mon Aug 23 11:54:46 1993
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Date: Mon, 23 Aug 93 11:33:24 EDT
From: "Christopher M. Khoury" <34I2NYW@CMUVM.CSV.CMICH.EDU>
Organization: Central Michigan University
Subject: Dunifer's Stereo 5 watt out yet?
To: FM-10 Mailing List <fm-10@dg-rtp.dg.com>
Message-Id: <930823.113324.EDT.34I2NYW@CMUVM>
Hi...
Does anyone know if Steve Dunifer's 5 watt STEREO kit is out yet??
I understand his origonal 5 watt kit is MONO...
Thanks
--chris
oh, and how much will it cost?
---------------------------
CHRISTOPHER KHOURY
34I2NYW@CMUVM.CSV.CMICH.EDU
---------------------------
From clout!balr!tellab5!liltyke!simon!steve@cs.uchicago.edu Mon Aug 23 11:42:47 1993
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Date: Sat, 21 Aug 93 00:57 CDT
From: steve@simon.chi.il.us (Steven E. Piette)
To: fm-10@dg-rtp.dg.com
Subject: Re: FM-10 Crystal Mod's
Well it seems that the problem with the mailing list is fixed and as an added
benefit Ramsey is fixing the seperation problem with the FM-10 kit. I don't
quite see how just the crystal is going to do it though.
Regardless this is great. I've spent untold hours digging around various stores
both here and in the Bay Area looking for a38Khz crystals since it didn't look
like the Digikey Epson crystal would work and now maybe I can get one for free.
I did manage to pound some seperation out ot the FM-10 by reworking the
network to Rohm's specs but it seems the right channel is still stronger and
it seems that the modulation level is less than before.
Here's what I tried to post two weeks ago.
> Message-Id: <m0oQ7jq-000NAzC@simon.chi.il.us>
> Date: Tue, 10 Aug 93 23:24 CDT
> From: steve@simon.chi.il.us (Steven E. Piette)
> To: fm-10@dg-rtp.dg.com
> Subject: Re: New Uploaded Files (and some questions)
>
>
> In the past week or so I received from Rohm data sheets on the BA1404.
>
> I had downloaded the ba1404.zip file earler but really couldn't read
> the text or examples very well so I rescanned the sheets I received at 150dpi
> and added the errata sheet they sent. I uploaded the new scans as tiff
> files hoping people could use them. If tiff is a problem I can convert to
> various formats. If people are interested I can also scan the application
> notes, there's about 9 pages.
>
> I've been playing with the stereo seperation problems with the FM10 kit
> and noticed that Ramsey's design is significantly different than the circuit
> that Rohm suggests. Has anyone tried using their circuit? I changed R7, R11,
> R12 to 50ohm pot, 150kohm, and 2.7kohm and thought things were working better
> but it seemed that the audio levels were reduced. I switched back and then
> noticed that the stock circuit has the network bypassed to Vcc where the
> Rohm circuit is bypassed to ground. Will this make much of a difference in the
> result? Rohm notes that if you change the values in there network that you
> must make sure not to change the phase relationships of the signals.
>
> I don't have a clue how to calculate phase delays yet.
>
> I also noted in the errata sheet that they give typical signal levels for pins
> 13 and 14 as 0.6v. When I checked them in the stock setup they were about 1.7v
> referenced to gnd. Could this difference have been because I just measured a
> DC bias and not the AC p-p levels?
>
> Has anyone seen the FRB 1/2 - 1 watt Stereo Broadcast Transmitter kit?
>
> Thanks,
> Steve
Right now I figure I can change this section one more time before I have to
etch an new circuit board and if I do that I'm going to do a new layout that
will include a few new features. I really like to get it right.
Steve
From white@sleepy.ctstateu.edu Tue Aug 24 10:08:36 1993
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Date: Tue, 24 Aug 93 10:12:11 -0400
From: white@sleepy.ctstateu.edu (Harry White)
Message-Id: <9308241412.AA19320@sleepy.ctstateu.edu>
To: 34I2NYW@cmuvm.csv.cmich.edu, fm-10@dg-rtp.dg.com
Subject: Re: Dunifer's Stereo 5 watt out yet?
From what I have heard, the FRB Stereo kit will be 1/2 to 1 W, and
will cost $35. I don't think that it's ready yet.
Peace
Harry
From WHITE@CCSUA.CTSTATEU.EDU Tue Aug 24 12:54:23 1993
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Date: Tue, 24 Aug 1993 11:06:55 -0400 (EDT)
From: "Government with a body count." <WHITE@CCSUA.CTSTATEU.EDU>
To: fm-10@dg-rtp.dg.com
Cc: WHITE@CCSUA.CTSTATEU.EDU
Message-Id: <930824110655.27800653@CCSUA.CTSTATEU.EDU>
Subject: Transistor Testing suggestions (fwd)
From: SMTP%"mellob@rpi.edu" 23-AUG-1993 13:45:42.28
To: WHITE
CC:
Subj: transistor testing
From: Brett A. Mellor <mellob@rpi.edu>
Date: Mon, 23 Aug 1993 13:46:07 -0400
Message-Id: <9308231746.AA38473@localhost>
To: white@ccsua.ctstateu.edu
Subject: transistor testing
This is the absolute easiest way I know of for a non-EE
to test a transistor. Basically because it is NOT required
that remove it from the circuit.
Break out your favorite ohmmeter. Measure the resistance across
the base and to either the collector -or- emitter, don't matter.
Then, REVERSE the probes but test the SAME two pins.
Zero, one way or the other, transistor is shot
Same both ways, transistor is shot
Infinite resistance, (an open) transistor is shot
Two _different_ real values, maybe a couple hundred ohms one way
and a couple kilohms the opposite way (depending on the
transitor) and it is definitely funtioning.
No transitor checker, no needing to take it out of the circuit.
It IS good practice to check BOTH base to emitter AND bae to
collector JUST IN CASE!
Although if a transitor is destroyed through thermal runaway, both
siders usually break down.
If for some strange reason, you want the theory behind how this
works, I'd be mroe than happy. Mail me.
-Brett Mellor -- mellob@rpi.edu
Rensselaer Polytechnic Institute
Troy, New York
(an Electrical Engineering student)
From WHITE@CCSUA.CTSTATEU.EDU Tue Aug 24 10:43:54 1993
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Date: Tue, 24 Aug 1993 9:30:23 -0400 (EDT)
From: "Government with a body count." <WHITE@CCSUA.CTSTATEU.EDU>
To: fm-10@dg-rtp.dg.com
Cc: mycal@NetAcSys.com, WHITE@CCSUA.CTSTATEU.EDU
Message-Id: <930824093023.27800653@CCSUA.CTSTATEU.EDU>
Subject: 2SC1971 Pinout needed stat!
Hi FM10-phans,
Can someone VERIFY the following pinout for the 2SC1971 power transistor
of the FRB kit?
Using a 1984 RS Semiconductor Guide, the TO220 pinout is:
+--+--+ ---- 3 EMITTER
|o | | ---- 2 COLLECTOR
+--+--+ ---- 1 BASE
This is the front view, with the elevated plastic body facing the viewer.
If this is really the pinout, there is a problem on the PCB. We were
instructed to mount the 2SC1971 from the bottom of the PCB, but the center pin
currently goes to ground. Hmmmm. HELP!
Could this be why I'm only getting 146mW out of a 5W design? I checked the
condition of the transistor using a method mailed to me by Brett Mellor (I'll
forward that post to FM-10 shortly) and the transistor appears to be OK.
Any help appreciated.
Regards
Harry
white@csusys.ctstateu.edu
From WHITE@CCSUA.CTSTATEU.EDU Tue Aug 24 13:21:13 1993
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Date: Tue, 24 Aug 1993 9:44:23 -0400 (EDT)
From: "Government with a body count." <WHITE@CCSUA.CTSTATEU.EDU>
To: fm-10@dg-rtp.dg.com
Cc: WHITE@CCSUA.CTSTATEU.EDU
Message-Id: <930824094423.27800653@CCSUA.CTSTATEU.EDU>
Subject: FM-10 70mW amp . . . for FRB kit?
Can the 70mW FM-10 amp be used with the FRB kit (when the FRB kit is putting
out 140mW)? The first problem I see is that the FM-10 kit appears to have a
fixed value capacitor at the RF output, whilst the FRB kit employs a 16-100pF
vari-cap at that position.
Thanks
Harry
From WHITE@CCSUA.CTSTATEU.EDU Tue Aug 24 16:44:52 1993
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Date: Tue, 24 Aug 1993 9:41:47 -0400 (EDT)
From: "Government with a body count." <WHITE@CCSUA.CTSTATEU.EDU>
To: fm-10@dg-rtp.dg.com
Cc: WHITE@CCSUA.CTSTATEU.EDU
Message-Id: <930824094147.27800653@CCSUA.CTSTATEU.EDU>
Subject: Do heat sinks cause capacitance problems?
Hi
I was reviewing the FM-10 archives and Clint noted (in his 30W amp
experience post) that he discovered that a transistor heat sink was causing
capacitance problems.
The FRB kit employs a top hat sink on a 2N4427 transistor. The top hat
stands over L2 (1/8 to 1/4" clearance), a 5T center-tapped coil, and the
top hat periphery overlaps C9, a 9-50pF varicap, with a vertical clearance of
3/8". Could this cause a problem? Of course, when I touch the top hat _in_situ_
my RF signal gets trashed, but I assume that this is to be expected given the
fact that the case is a functional part of the transistor (?).
Comments? Slaps to the side of the head?
Thanks
Harry
white@csusys.ctstateu.edu
From jchattin@marlin.nosc.mil Thu Aug 26 10:49:50 1993
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Date: Thu, 26 Aug 93 07:49:42 -0700
From: jchattin@marlin.nosc.mil (Jonathan M. Chattin)
Message-Id: <9308261449.AA26867@marlin.nosc.mil>
To: fm-10@dg-rtp.dg.com
Subject: request fm-10 data
Thanks.
^Z
From @mail.uunet.ca:jaywon.pci.on.ca!sizone!sdavis@pci Thu Aug 26 14:12:47 1993
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Message-Id: <6Jew9B1w165w@sizone.jaywon.pci.on.ca>
Date: Thu, 26 Aug 1993 12:34:28 -0400
Organization: SIZone, Soviet Recommunization Assoc., Toronto 416-YOU-SAW-BOB
From: sdavis@sizone.jaywon.pci.on.ca (Scott Davis)
To: fm-10@dg-rtp.dg.com
Subject: Happy..?
I'm happy again. My FM-10 mod kit should be here any day, and my parts
for Mycal's 800mW amp just arrived from Mouser. I just finished etching
an integrated 800mW and 30mW booster circuit board - anyone else thought
about combining both amp and booster onto one PCB? Once I did it, I
realised that I think it's much nicer than throwing the booster onto the
FM-10 itself..
Peace,
Scott.
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