Trantec S3500 problem

[sandall]

When using a tx tuned to the same freq the A & B lights on my S3500 receiver flash backwards & forwards rapidly & the display stays in RF Mute. Before I send it off to Mike Lowe (or bin it) has anyone met this & have any ideas?

[paulears]

Connect just one antenna and see if the LED stays on the one with antenna selected. If it continues swapping, do you hear the switching between noise free and noisy signal from the antenna-less channel? I've got one that does this, and it seems to be a fault in the LED circuit as I've satisfied myself the actual RF switching os working properly and the display is all that is random.

[sandall]

Thanks Paul. I think it's a bit deeper than that - the lights flash at a fairly fast regular speed & "RF Mute" stays on. I did find an old HH that would unmute the RF, but that just produced a loud digital-sounding noise from the rx.