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Wednesday 8 May 2024

Miteq Module A2 UHF Oscillator P/N 0457A - Changes to get 925MHz out

Part of a much larger project to get on 6cm here is the modifications needed to convert this module to 925MHz. While possible, but deferred till later, 926MHz would be better since it would convert 6cm down to the 2m band aligned on 144MHz.


Here is what is required:

Restore the link on 3, 7 and 8 (see pic below for labels)

Break link on 2, leave 1 and 6 closed.

To achieve lock (led goes out) you will probably need to move short on coax tuning stub halfway down stub.

Adjust trimcap for about 7V on pin1 of the NE5534 (or on violet wire?)

 


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