eedork
Super Member
I just picked up an early MC250 in fairly rough but original condition. It appears to be untouched and I was told that it does indeed work. The biggest issue is the rust on the chassis which, unfortunately, is not easily fixed.
Assuming it works as the seller stated, I'd like to replace all of the caps on the input and power amp boards. The main filters and multicaps will probably stay for now, although eventually I'd like to replace the multicaps as well. I'm not planning on replacing any other components unless they test way off value. I'll probably also clean and re-grease the outputs and drivers.
Looking at the schematic I see two pots on the input board - R3 and R4 - it looks like these are just used to adjust the DC voltage on the emitters of Q5 and Q6, respectively. Is this correct?
Thanks!
-Matt
Assuming it works as the seller stated, I'd like to replace all of the caps on the input and power amp boards. The main filters and multicaps will probably stay for now, although eventually I'd like to replace the multicaps as well. I'm not planning on replacing any other components unless they test way off value. I'll probably also clean and re-grease the outputs and drivers.
Looking at the schematic I see two pots on the input board - R3 and R4 - it looks like these are just used to adjust the DC voltage on the emitters of Q5 and Q6, respectively. Is this correct?
Thanks!
-Matt
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