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Philco 90 Tube Shield Question
rghines1
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#3

04-09-2012, 06:37 PM

Be interesting to put a scope on the audio output to be sure it's not oscillating at ultrasonic frequencies or higher that would be inaudible.

Potential risk of capacitive coupling between the two 27 tubes and audio output stage.
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Messages In This Thread
Philco 90 Tube Shield Question - by Geoff - 04-09-2012, 03:13 PM
RE: Philco 90 Tube Shield Question - by tab10672 - 04-09-2012, 04:41 PM
RE: Philco 90 Tube Shield Question - by rghines1 - 04-09-2012, 06:37 PM
RE: Philco 90 Tube Shield Question - by Geoff - 04-09-2012, 06:51 PM



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