Hello, I have another question for the group... I'm curious if it will be possible for me to write a script to control a fan for my transmitter to operate under app_rpt? I'm using my homebrew IRLP-compatible board for PTT and COS, and have managed to configure usbradio.conf to key the AUX1 port (pp3) along with the PTT using: pp3 = ptt I was considering building a hardware control circuit using a 555 timer, but thought I'd look into a software approach if possible. I used a similar script under IRLP/EchoIRLP by Robert Pectol, and it worked very well. Thanks. 73 Kyle K0KN