[ICOM] WTB: IC-22U or IC-22S
Mike Besemer (WM4B)
mwbesemer at cox.net
Mon May 18 21:29:51 EDT 2009
I'm wondering how it would do in a somewhat high rf environment. The
antenna for the link is about 60 feet below the repeater antenna and the
frequencies are only 1.6 MHz apart. That's why I'm keen on the IC-22
line... they front ends are rumored to be bulletproof (or at least I hope
so)!
73,
Mike
WM4B
> -----Original Message-----
> From: icom-bounces at mailman.qth.net [mailto:icom-
> bounces at mailman.qth.net] On Behalf Of Gary Fiber
> Sent: Monday, May 18, 2009 8:28 PM
> To: ICOM Reflector
> Subject: Re: [ICOM] WTB: IC-22U or IC-22S
>
> Some over the years have also used an IC-2AT which had the thumb
> wheel switches on it. Low power but you sure can stick an amplifier
> behind it. The DC-1 is the 12 volt power supply for it. !2 volts in
> some 9.6 volts DC out.
>
> I once ran across an article describing how to build a DTMF to BCD
> interface for DTMF control of the IC-2AT.
>
> Gary K8IZ
>
> At 05:03 PM 5/18/2009, you wrote:
> >That's what I was thinking as well. Still hoping for the 'prug and
> pray'
> >solution, but that's definitely an option.
> >
> >Haven't looked at the schematic yet... is it (hopefully) just a matter
> of
> >applying a ground?
> >
> >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 6:17 PM
> > > To: ICOM Reflector
> > > Subject: Re: [ICOM] WTB: IC-22U or IC-22S
> > >
> > > 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
> > > >> >> ----
> > > >> >> 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/
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> > > >> >----
> > > >> >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
> > > >
> > > >
> > > >----
> > > >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
> >
> >
> >----
> >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
>
> Gary Fiber K8IZ
> GROL PG-19-6691
> Washington State Resident
>
> ----
> 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
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