... is larger than the signal-plus- noise input, the voice gate will turn on AR5 which outputs a high Squelch Control signal and gates on U3. ... This amplifier, consisting of Q5 and Q7, and Q6 and Q8, boosts the Rev Audio to approximately 1 watt. ... The dc power from the vehicle system is routed through the rf amplifier to the series dc limiter circuit (Ql, Q2). ... The +28v On from the receiver/ exciter is routed to power supply Ul. The outputs of Ul are +12v and +6.4v and are used in this card.
|Title||:||General Support Maintenance Manual|