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QRZ Ham Radio Callsign Database - Volume 8.iso
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ic22s.txt
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1996-10-27
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54 lines
Subject: Re: Icom IC-22s mods request...
Organization: SLIC Amateur Radio Support, San Diego, CA
Lines: 47
mlodge@ca.NOvell.COM (Michael Lodge) writes:
>
> I am looking for any/all mods to the rather elderly Icom
> IC-22s 2-meter transceiver. I have made a couple myself
Just happened to trip over my hard-drive and found this...
Radio & Electronics RT
Category 6, Topic 34
Message 13 Sat Dec 08, 1990
MURREY [Brian KB9BVN] at 20:12 EST
Here's what I have on the ICOM mod for the 22S
==============================================
Icom IC22S.MOD Packet Modification
The Icom IC22S is a ten watt diode matrix PLL synthesized 2 meter rig
manufactured in the early 1970's. In it's stock condition it tunes 146-148
MHz in 15 KHz steps. Since I am sure there are a few of these sitting on
shelves collecting dust due to the limited tuning range, why not modify them
for the perfect packet rig.
First replace the 7.68 MHz Oscillator/Divider crystal (X1) with a 5.12 MHz
crystal. This will move the band to 145.00- 146.94 MHz in 10 KHz increments.
The repeater offset will now be 400 KHz which should not pose a problem in
simplex packet operation. I will give the diode matrix settings for the most
commonly used packet frequencies. You can formulate others as needed using
the formula N=100*(f-145)+61 and the manual. The diode positions indicated
ARE WHERE DIODES ARE PRESENT. The other positions are left empty.
145.01= D5,D4,D3,D2,D1
145.03= D6
145.05= D6,D1
145.07= D6,D2
145.09= D6,D2,D1
73's de Scott N5JLQ @ K6IYK....RELAYED BY WB0SEN & N0KGX
----------
--
Mike Shirley, WB6WUI INET: mikey@slic.cts.com
PO Box 460 (San Diego) UUCP: {hplabs!hp-sdd nosc}!crash!slic!mikey
Lakeside, CA 92040-0460 GEnie: SLIC