The Tadiran PA-500 is a solid state 500W amp that interfaces with the Motorola Micom series of milspec radios. The system is often used for HF ALE comms.

I'm trouble-shooting a couple of the amps and have been trying to interface the amp to a Yaesu HF transceiver.

Does anyone have experience or knowledge of what the PA-500 requires for interfacing to a radio other than a Motorola Micom?

I have the amp working but still need to figure out how to get it to detect band changes. I suspect the Tune and/or Ch Change inputs need to be active.

Thanks for any suggestions & 73

Ed, KI6R

Tucson, AZ

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