Hello, has anybody on the group succesfully interfaced the 705 to the ART 120 amplifier.

Needing to protect the PTT signal from the 705 against feedback/transients from the amp.

Assume from what I have read is that the amplifier will detect the TX frequency and switch in the correct filters.

Been looking at the Ameritron ARB-704 to handle the PTT line, however cannot find one for sale. Any other suggestions.

Thanks