Re: Trio TR2200GX RX Oscillator
D4 is turned on via an RFC (L21) etc. on the Receive 9 volt line, that makes it conduct and allows the connection to the to crystal make a path, at the same time that voltage seems to block via L20, and reverse bias D5, I don't know what that feed line is though as the diagram is not inclusive.
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Last edited by Cruisin Marine; 30th Jan 2023 at 12:25 am.
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