All three nodes read the same 17.78v dcWhich side of C52 are you looking at? Do all three components at that node (transistor, resistor, capacitor) read exactly the same?
1.5mv acIf there’s an AC signal on the base of TR12,
Only 3.5mv ac at C52 vs 39mv ac at C51 (same place in identical circuit)you should have about the same signal in the emitter (with about a 0.6VDC lower reading), and a signifigantly larger copy of that signal (polarity reversed) on the collector, as well as on both sides of C52.
I pulled the output wire on C52- no difference.It’s possible that the output side of C52 is loaded heavily. That isn’t shown on the schematic, but of course it goes somewhere, and that might be shorted.
I have looked the circuit over multiple times and I can find no other visible issues. (broken traces, solder bridges )
I do not seem to have a signal at C40. I do have a signal at C24. Can I safely jump from C24 to C40 to see if the signal then goes through the Transistor TR12 to C52?
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