Hi current (max. 10A) hfe transistor meter circuit with 1:1 PCB design (watch mirror image)
Transistor curve tracer with X and Y output for oscilloscopes with 1:1 PCB design
Hand drawn PCB layout/wiring, and deduced schematic, for the Channel 2 MIC input stage up to the LINE/INST switches.
Took ages to trace this, while fixing this unit (R59 open, causing very low MIC gain).
Channel one circuit will be identical, and PCB la
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