[amsat-bb] Re: s-band crystal
G0MRF at aol.com
Tue Sep 14 00:51:00 PDT 2010
In a message dated 14/09/2010 04:11:27 GMT Daylight Time, nigel at ngunn.net
Remember that "less than a buck" crystals are mass produced, often to
relatively loose tolerances and poor temperature
stability, and is unlikely to match your oscillator configuration.
A properly cut crystal to your specification will probably cost you 30-40
My choice of supplier is http://www.quartslab.co.uk/
Don't forget to specify the oscillator configuration and component values
if they don't know your particular
If you have no luck with the sub one buck crystal. I have a small number of
made to order crystals for the Drake converter. Reduced height compared to
the HC49U and 20pF to match the Drake oscillator.
However, I believe you can run the Cal Amp with the original crystal. This
gives an output somewhere around 123MHz. The original xtal will be a
decent spec and 123MHz is good as most unmodified transceivers will not transmit
into your converter.
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