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Old 17th May 2021, 12:34 pm   #6
Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 6,782
Default Re: 20.431 Mhz Crystal wanted

Supercope, if you contact the likes of Quartslab (Post #2) and tell them the PTBM... (or whatever) board number in that radio and that it's a band crystal they will probably know the rest of the needed detail, or if you were willing to send them one of the existing loop mixer crystals to analyse, they can do that (you would get the original crystal back along with the new crystal as long as you made clear that you wanted to retain the original).

Bear in mind that just changing the loop mixer crystal won't rearrange the channel frequency steps, you'll probably have to use an EPROM to do that.
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