Final Stage - SAC SS-800AVS Manual

2.2.6 Final Stage
The final stage is a parallel push-pull class AB amplifier formed
by~Ql, Q2, Q3, and Q4. These transistors are matched at the factory
with a specific range of current gain. CR4, CR5, CR7, CR8, R5, R9,
RI5 and RI9 provide protection when an inductive load or open circuit
causes large voltage spikes at the transistor collectors. T2
impedance matches the circuit to a 50 ohm output. The pi network
C5, LI, and C6 is a lowpass filter.
SS-800AVS Southern Avionics 39
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