I am totally new to data comms and have loaded the current JT65 HF
software and am using a USB driven interface cable from my Windows XP
desktop PC to my old boat anchor Yaesu FT-902DM transceiver. the cable
is from a UK company called radio Arena and is shown here (site can be
It has a LED on the case to show (I assume) when it triggers the PTT.
Using the JT65 "Test PTT" button the LED on the interface lights and
the PTT RCA plug that goes to the PTT connector on the back panel of
the transceiver goes closed circuit, tested with a continuity meter.
The rig however does not go into TX mode. Shorting the PTT connector
terminals on the transceiver sends it into TX mode. Am I missing
something like it also needs an audio signal input, or
misunderstanding the "Test PTT" function in JT65? Or is it likely a
hardware issue with the interface cable? Thanks!