This is a reply for the ''Bandit'' single tone roger-beep... What I've done is replace C2 by a 56 nf or equivalent is 0.056 uf + replace that resistor that keeps heating up ''R6'' by a 1K & put a 3meg resistor in line with the audio out ''white wire'' of the BR Board. This makes it pretty decent on my side. For the green wire they replaced it by a blue wire. The ''Burping sound'' comes out from the relay... You have to live with it or replace the ''Bandit'' by a 5 tone Roger Beep... I like the 5 tones better than the cheap ''Bandit'' give it a try & enjoy man...