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OK, so they count on 1.5V under load from each battery.
This is probably why they also preferred Ge transistors, for the low power Vcc.
Anyways, have you check that cap?
When you exhaust all we outlined for tests before, might need to check the transistors. Just in case. They rarely go bad especially with this kind of power voltage, but who knows. Plus as Brenda told me today, some American Ge transistors are prone to the Tin Whisker plague (something I never encountered before) - could go bad for that reason, if not for the others.
Doubt it but the chance is non-zero.
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RE: Philco TPA-1 - by morzh - 01-17-2014, 08:25 PM
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