There's more specs to crystals then just the frequency. There is the
capacitive load either series or parallel and whether the crystal is
operated at the fundamental or a harmonic and also the case type. If you
want something that will work, I suggest you just get the tentec crystal
that was made to the correct specs for the radio. I've been through this
with other things and it is a bear to get a correct crystal. And of course
whoever makes this crystal would have to tool up to make just one. That
makes it expensive
Carl Moreschi N4PY
121 Little Bell Drive
Bell Mountain
Hays, North Carolina 28635
----- Original Message -----
From: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
To: <tentec@contesting.com>
Sent: Tuesday, January 16, 2007 10:24 PM
Subject: Re: [TenTec] Crystals needed
> On Tue, 2007-01-16 at 19:55 -0600, Danny Shaver wrote:
> > Does anyone know of a source for the crystals for 17 and 12 meters in my
Omni C, which is cheaper than Tentec, who want $25.00 each plus shipping.
What type holder are they in. From my manual they appear to be 4.0 MHz for
17 meters and 10.5 MHz for 12 meters. Is this correct?
> >
> > Danny N5NBK,
> ICM in Oklahoma City is very good and they charge accordingly.
>
> I hear Peterson Crystal in Council Bluffs Iowa is still making ham
> crystals. I don't have a catalog or a web page.
>
> Ordinary frequencies like 4.000 MHz can often be found in small packages
> from Mouser, www.mouser.com. Might need a bit of adaptation to fit the
> sockets in the Omni C. With wire leads 520-HCA400-20X for 40 cents has a
> chance of working. But I don't see any crystals in the Mouser catalog
> for 10.500 MHz.
>
> With the IF at 9 MHz, twice the IF is 18 MHZ, and the VFO also was mixed
> to 9 MHz, and twice that is 18 MHz, guaranteed strong transmitter spurs
> on 17 meters.
>
> 73, Jerry, K0CQ
>
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