Ran Smoke Test Last Night on MC275

[rkic]

Originally posted by ron-c
Rkic,

You can not substitute a non polarized poly cap for a polarized electrolytic. None of those are in the signal path anyhow. Your AC voltages will be wrong with the poly caps. Respect the original design of the amp and use modern parts but not parts of different value or type.

Thanks,
Ron-C

Ron-C, your response seems a bit terse. Have I done something to offend you?

 

[ron-c]

Rkic,

No, not at all. Maybe the coffee was wearing off or the whiskey was kicking in!

Antique Radio Supply has the 12 mfd polarized electrolytic you need. I have them in my MC275 original and they work fine.

Keep us posted on the progress of the amp.

Groove Tubes sells a variety of 12ax7 tubes. I have some samples and the GT12axr3 are quite special if you want to add some liquidity to the sound, especially the mid range. These are a candidate for the V1 position in the MC275s or in a pre amps phono section.

Thanks again,
Ron-C