Hi Chook,
1) Yes i'm using the OPC 2401 cord
2) The flycom came with a single 6.3/6.6 mm audio plug which I had to purchase a adapter from pilot communications to suit the GA plugs on the opc-2401
3) I can't confirm as i don't recall a ptt symbol chook but i do get the standard TX symbol com up on the screen when pushing either PTT
This handheld by the way was purchased in Aus as im told there are different models. All testing was done yesterday on 123.45 mHz. And a couple of times 132.900 mHz at the aerodrome.
When i first had it all running a couple of months ago which was only a couple of minutes with machine on and off, I was on 126.700 mHz and had the same initial problems as i've described above and all i did from memory was turn off the Blue tooth and change the mic setting to Internal. ANL is turned off, TOT is turned off, My squelch is around 5 ATM and the side tone ive tried at all different levels. the only other variable i've noticed since i returned home and re-reading the manual is the handset will stop transmitting if the battery is exhausted. I not sure what the manufacturer means by exhausted. The battery voltage was 7.2 volts and took about 2 hours to charge up today. I did how ever try the helmet headset on an older icom 24 and it worked fine for both transmit and recieve.
thanks Benno !