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I've never touched a Cobra, Uniden, Galaxy, Ranger or General that had the chassis and board tied together at DC ground. The link Connor shared months ago from W8JI showed exactly what I'm talking about and he refused to see it. It just isn't there.
And there is NO continuity there. You're looking at pictures and it's got you confused. Connect the ground of you meter or scope to the chassis and try to set DC voltages on the board and get back to me.
If there is no need to measure the peak envelope, then the peak envelope must be useless, but we all know the audio is what makes the peak envelope. A carrier doesn't convey a whole lot of information without it, so it makes as much sense to measure pep on AM as it does SSB.
That's incorrect as well. Changing/modifying components to ring it out is one thing, peaking a resonant circuit is another. A resonant circuit needs to be peaked to transfer the most power to the load, or it is lost as heat within the circuit.
If you want to discuss the efficiency of AM and SSB, we can do that. But you said the peak envelope of an AM signal is useless which is absolutely incorrect.
JJD just recently bought an L4, but he didn't take measurements or notes before putting it in the air. Maybe you can talk him in to lowering it for the sake of some documentation.
I dunno, I had an N2 on base and I hung it on it's bracket. The fans pulled the heat out via the heat sink, and I never had a heat issue with that radio.
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