From cbfsb!att!rutgers!network.ucsd.edu!dog.ee.lbl.gov!nosc!crash!slic!mikey Sun Mar 15 08:45:14 EST 1992 Article: 15912 of rec.radio.amateur.misc Path: cbfsb!att!rutgers!network.ucsd.edu!dog.ee.lbl.gov!nosc!crash!slic!mikey From: mikey@slic.cts.com (Mike Shirley) Newsgroups: rec.radio.amateur.misc Subject: Re: Icom IC-22s mods request... Message-ID: Date: 14 Mar 92 05:00:44 GMT References: <9203112106.AA11308@ca.novell.com> 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