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

[Mike Besemer (WM4B)]

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
>    >> ----
>    >> 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
>    >Icom FAQ: http://www.qsl.net/icom/
>    >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
> Icom FAQ: http://www.qsl.net/icom/
> To support QSL/QTH.net: http://www.qsl.net/donate.html