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SolderSmoke Daily News
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Troubleshooting Apollo: 23 MHz Crystals in a NASA Ground Receiver
Posted: 31 Dec 2021 02:22 AM PST
http://soldersmoke.blogspot.com/2021/12/troubleshooting-apollo-23-mhz-crystals.html
More amazing Apollo stuff from CuriousMarc. Here we see them struggling to find the proper frequency for one of the oscillators in a dual conversion
UHF receiver from the Apollo program. For the VCO, they needed a crystal
in the 23 MHz range. They faced the same questions we face: Series or parallel? Load capacitance? Fundamental or overtone? It just so happens that at this moment I have on
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