Tube Amp Archive

As to the original question about Mallory's, I'd agree and say no. I've used quite-a-few different brands of AL caps, and like Ken Moon, between the two I'd just as soon go with Nichicon over Xicon, as they are easier to get (esp. in repairist/smalltime amp hobbyist quantities) and the quality seems...

Some kind of contact cement is usually good, and if it is solvent based, make sure it won't soften/melt the tolex.

Ummm ... the resistor we're talking about (I think) is the load resistor for the NFB loop. It's chosen in tandem with the feedback resistor itself to establish the ratio of feedback you want: 820R/100R (or sometimes 47R); 27K/5K (usually implemented as a Presence pot); also sometimes 100K/5K; 56K/4...

Really? I haven't seen a lot of them, myself. I have a '64 Tremolux, and it has the standard 820/100 setup. This what you have? If I understand, you have modded the the feedback resistor with a pot to make a kind of "soul" control? Cool. I did that on my Blues Deluxe. I guess I'd still recommend tha...

Just looking at the parts in your picture, your circuit looks more like the AA864 than the AB165. I would definitly put a 100r in place of the 270K. Whether you want to keep the 820 NFB connected is up to you. As a guess, I'd say that someone along the line tried to convert the circuit back to more ...