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Published 20 hours ago • verified publisher icon M17-Project

Power output

Open sp5wwp opened this issue 5 years ago • 5 comments

  1. Power output is limited to 0.75W. At that power, the bias voltage is 2.9V.
  2. There's a high pitched sound audible when PA is active.

ALC circuitry works.

sp5wwp avatar Oct 12 '20 14:10 sp5wwp

Squeak was eliminated by adding a 10k resistor in parallel to C106.

sp5wwp avatar Oct 12 '20 18:10 sp5wwp

Maybe we should get rid of Q3 (BGA6589).

sp5wwp avatar Nov 12 '20 19:11 sp5wwp

Is this related to issue #8/9 in the errata, about R64 and C106?

tkuester avatar Nov 12 '20 19:11 tkuester

@tkuester yes, it is.

sp5wwp avatar Nov 12 '20 20:11 sp5wwp

The RF lowpass stage (around L9, L10) has to be redesigned.

My proposal: obraz

sp5wwp avatar Nov 14 '20 13:11 sp5wwp