ICR7000

   MODIFY YOUR ICOM R7000 TO SCAN AND SEARCH FASTER
                   Bob Parnass, AJ9S
This article describes how to  increase  the  scan  an
search speeds of the ICOM R7000 receiver by 60% without
noticeable performance degradation.

                      Background

The  front  panel  SCAN  SPEED  control  on  the  R7000
receiver  allows  the user to adjust the speed of scan-
ning and searching operations, as well as the  rate  at
which  the  priority  channel is sampled.  Rotating the
control counterclockwise decreases the speed, and rota-
ting it clockwise increases the speed.

When the SCAN SPEED control on my R7000 (serial  number
001400)  was  turned  fully  clockwise, the radio would
scan a maximum of about 8  channels/second,  or  search
about  8  increments/second.   As  the  following table
shows, the stock R7000 can scan  about  as  fast  as  a
Radio Shack PRO-30 or PRO-2003.

TABLE 1.  Maximum Scan Rates of Selected Receivers

 _____________________________________________________
[             Scanner               Maximum Scan Rate[
[                                [  (channels/second)[
[________________________________[___________________[
[ Kenwood TR-2600                [         1.2       [
[ Radio Shack PRO-30             [         8         [
[ Radio Shack PRO-2003           [         8         [
[ ICOM R7000 (stock)             [         8         [
[ ICOM R7000 (after modification)[        13         [
[ Regency M400                   [        13         [
[ Bearcat 20/20                  [        15         [
[ Bearcat 300                    [        15         [
[________________________________[___________________[

CONTINUED IN FILE ICR7000.3