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Jon_G4MDC · 7th Sep 2019, 9:23 am

After a little bit more checking of the facts...

PF8 (RF same as PF9 I'm sure you know) uses ~48MHz crystals.
These are 3rd overtone and series resonant to the best I know.

Transmitter Fx=Ftx/9
Receiver Fx = (Frx-10.7)/9

I might have a handbook somewhere which would give the Pye crystal spec.
That would read something like T36S or some such. If you have crystals already fitted in the Green & Red frequency modules there is a good chance it is stamped on them.

Hy-Q next to Whittlesford Station knew what those specs meant in terms of oscillator loading and pulling.

It is possible that Quartslab know them too - I know for sure they have the PF1 information and have made very many. Some frequencies used to be stocked.
I don't know what they know about PF8 & 9.

7th Sep 2019, 9:23 am	#4
Jon_G4MDC Nonode Join Date: Nov 2015 Location: Welwyn Garden City, Hertfordshire, UK. Posts: 2,015	Re: Pye PocketFone crystal spec? After a little bit more checking of the facts... PF8 (RF same as PF9 I'm sure you know) uses ~48MHz crystals. These are 3rd overtone and series resonant to the best I know. Transmitter Fx=Ftx/9 Receiver Fx = (Frx-10.7)/9 I might have a handbook somewhere which would give the Pye crystal spec. That would read something like T36S or some such. If you have crystals already fitted in the Green & Red frequency modules there is a good chance it is stamped on them. Hy-Q next to Whittlesford Station knew what those specs meant in terms of oscillator loading and pulling. It is possible that Quartslab know them too - I know for sure they have the PF1 information and have made very many. Some frequencies used to be stocked. I don't know what they know about PF8 & 9. Last edited by Jon_G4MDC; 7th Sep 2019 at 9:31 am.