Hi Wayne...Are you referring to the Epson programmable oscillator chips? You can order them to put out a square wave on any freq up to about 125 mc as I recall. $4.10 apiece, very fast delivery from Digikey.

I revived a TRC-88 USB manpack with them versus custom crystals in the receiver LO and transmitter HFO, they work just fine, pretty easy to implement. Just add + 5 volts. Take a look here for details on how I did it. https://www.n6cc.com/trc-88-hf-cwssb-transceiver/

Thanks to W9RAN for the heads up on these versatile parts!

Tim

N6CC

On Sat, Nov 20, 2021 at 8:02 AM <[email protected]> wrote:

What is the best option for using those little digital oscillators to replace crystals? I bought a 1 MHZ oscillator module and used it to replace the calibration oscillator in an SG-297, and that worked just great, but I need some specific frequencies for sets like the R-361, SCR-522 and ARC-3.

Thanks,

Wayne
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