[ICOM] WTB: IC-22U or IC-22S

[Jim Hargrave]

Mike,

You can modify the IC-22s for the lower 2m frequencies. I have modified
several and at one time had 4 of them on my Packet BBS/Cluster. It is a very
reliable rig after you fix the synthesizer. All the Icom radios of that
vintage used steel feed-thru pins in the synthesizer boards. After a  time
the solder connection would go cold due to dissimilar metals. The 22s has 13
such animals. I removed them and replaced them with a short piece of copper
wire. That fixed them.

To put a 22S on the lower frequencies you replace the synthesizer Reference
crystal and add a divide by 2 IC. I used 1/2 of a CD4013. That will make it
tune to the lower part of the band in 5 khz increments. 10.24 mhz CB
crystals work fine. The drawback to this mod, is the radio is only good for
simplex as the shift becomes 400 khz instead of 600. Most of our application
was as packet digis, so it was not a problem. Some were also used as
repeater receivers.

If you can find the 22U, its better, but a lot more 22s's were made than
22u's. Sorry, but I gave away 3 of the modified 22s a couple of years ago.
Except for the DX Cluster, packet is a fading mode in this area.

   * 73's Jim W5IFP *


   >-----Original Message-----
   >From: icom-bounces at mailman.qth.net
   >[mailto:icom-bounces at mailman.qth.net]On Behalf Of mwbesemer at cox.net
   >Sent: Monday, May 18, 2009 7:09 PM
   >To: ICOM Reflector
   >Subject: Re: [ICOM] WTB: IC-22U or IC-22S
   >
   >
   >All,
   >
   >I just realized that the IC-22S does not cover below 146 MHz and I need
   >it down on 145.11.  Because of this, I can only use an IC-22U.
   >
   >Sorry about that es 73,
   >
   >Mike
   >WM4B
   >
   >
   >On Mon, May 18, 2009 at 3:07 PM , mwbesemer at cox.net wrote:
   >
   >> I'm looking for an Icom IC-22U or IC-22S for use at a
   >repeater site as
   >> a remote base. Physical condition is not particularly important. I
   >> would prefer a working unit, but may consider one in repairable
   >> condition, depending on the fault.
   >>
   >> 73,
   >>
   >> Mike
   >> WM4B
   >> ----
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