What circuits do they use? How do they ensure they are
linear? What efficiency do they get?>
My amp uses a darlington pair/PNP-NPN complementary
arrangement - much like some early audio amplifiers.
Only linearity checks I've made are by staring at the
waveforms on a scope and asking for IMD on air checks.
The amp is basically a bunch of emitter followers so I hope
it is inherently linear.
The efficiency is pathetic. I would have expected to get at
least 60% from a class AB circuit but it is below 40 !!
Brian G3YKB
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