Yes, pictures should help. Especially of any trace repairs that have been done.
Also, e,b,c voltages for T3 and T5.
Also, e,b,c voltages for T3 and T5.
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Show posts MenuQuote from: markorock37 on April 13, 2024, 02:57:58 PMI don't see 2SA872 on Mouser, is KSA992 a good sub?Yes, those should work.
Quote from: saturated on April 12, 2024, 07:53:18 PMSo I'm going out on a limb here and proposing that the 8k ohm 10w resistor is shorted to ground. It measures 170v on one end and zero on the other.That's not going out on a limb, that is good solid logic. (assuming you verified the resistor is ok)
A quick look at the schematic (a forensically enhanced version kindly provided by the Mighty Mick) to me places cross hairs directly on the zener diode.
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So I'm guessing that the zener diode is shorted...idk.
Quote from: RookieRecurve on April 11, 2024, 10:09:19 AMMy main concern is with the ground. I am unsure if sharing a ground with an external amp and an internal amp would cause any issues?It can cause issues with ground loops or worse. Some amps require their output (-) terminal to be isolated from ground for things like current feedback schemes.
Quote from: Bandito on April 06, 2024, 04:15:56 PMWould this one work? https://www.hotroxuk.com/accutronics-blue-reverb-amc2bf3.htmlThat is too low input impedance. If you want to go with that miniature type, use the AMC2EF2. In my experience, the miniature type do not sound very good.