working copy, tested with iss pass, able to detect and send packets which decoded when straight into soundcard. Also switch path to ARISS however not completely correct. Still need ot wire up radio
wired up D11 to mic via a 1uF cap and a ferrite choke, pressing PTT button allowed me to key up the radio and transmit a packet which was decoded by my base station radio. Still struggling to get PTT working remotely - suspect need a cap as suggested by others.