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Old 3rd Jul 2020, 6:57 pm   #11
thermionic
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Join Date: Apr 2003
Location: Cornwall, UK.
Posts: 986
Default Re: Rogers Ravensbrook series2 amp. Before attempting a capacitor replacement.

Sounds like you’ve nailed it, Andy!

What I’ve found with these old AC coupled amps, is that whilst the interstage capacitors might check ok for ESR and capacity, they can be overly DC leaky. This can upset the biasing slightly in the following stage, which can result in greater distortion and other odd effects.

Cheers.

SimonT.
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