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

[Jim Hargrave]

Mike,

That is not a big problem, since you are planning on using them for a fixed
frequency application.

You can program one channel for the receive frequency and another for the
transmit frequency and switch channels from Rec/Transmit. That will give you
the 600hz offset.

   * 73's Jim W5IFP *




   >-----Original Message-----
   >From: icom-bounces at mailman.qth.net
   >[mailto:icom-bounces at mailman.qth.net]On Behalf Of Mike Besemer (WM4B)
   >Sent: Monday, May 18, 2009 10:01 PM
   >To: 'ICOM Reflector'
   >Subject: Re: [ICOM] WTB: IC-22U or IC-22S
   >
   >
   >Jim,
   >
   >I did see the mods for the lower frequencies, but unfortunately I need a
   >duplex application since it'll be used as a remote base.
   >
   >I've thought of several ways to get around the 400 KHz problem,
   >but all are
   >more work then I want to do if I can avoid it!  I'm hoping to
   >find a 'U' or
   >even a cheap 'A' that I can crystal for our application.  If not, I'll
   >probably find and 'S' and do some mods to make it do what we need.
   >
   >Thanks for the help.
   >
   >73,
   >
   >Mike
   >WM4B
   >
   >> -----Original Message-----
   >> From: icom-bounces at mailman.qth.net [mailto:icom-
   >> bounces at mailman.qth.net] On Behalf Of Jim Hargrave
   >> Sent: Monday, May 18, 2009 5:46 PM
   >> To: ICOM Reflector
   >> Subject: Re: [ICOM] WTB: IC-22U or IC-22S
   >>
   >> 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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   >>    >Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
   >>    >Icom Users Net: Sundays, 1700Z, 14.316 MHz
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   >>    >To support QSL/QTH.net: http://www.qsl.net/donate.html
   >>
   >> ----
   >> Your Moderator: Dick Flanagan K7VC: icom-owner at mailman.qth.net
   >> Icom Users Net: Sundays, 1700Z, 14.316 MHz
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   >
   >
   >----
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   >Icom Users Net: Sundays, 1700Z, 14.316 MHz
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