Master Brightness Caps in Non-HRM Amps

[David Root]

Thanx Tony, I am hoping a good burn-in will really help too, but while I'm waiting I'll try some of these approaches to see what else helps.

[hitchcaster]

Thanx again Tony! I bought them expecting +/- 5uF or so, they were around 7.5 to 8uF so I pointed that out to the Ebay seller and he promptly refunded my money and delisted them from his site, so I can't blame him. He didn't want them back so I kept them.

They are new old stock, 1988, the clean sound is good though. It's only the OD that's harsh.
I will change them out to the same as what's on V2, these are old NOS e-caps I got from Steve at Apex Jr., have been using them for years without problems.

The 500pF cap across the V1B grid resistor is in your layout, so I assume it's authentic. If changing out those TVANs doesn't help I'll certainly look at it.

The PI plates are at 288V and 287V, the PI cathode is 56.5V.

The presence cap is actually two 1uF 50V radial caps as I didn't have any 2.2uF caps when I built it. I now have some Sprague 2uF TE caps which measure about 2.4uF, I should change those 1uFs out, especially as they are Black Gates which was all I could find on hand at the time.

Clean mode with PAB sounds OK.

I'll check over the solder joints too.

black gates are cool but fwiw I Remember not liking them too much in dumble builds. I do remember liking the red NP caps sometimes. check it out

[David Root]

hitch, they were the red NP Black Gates, 1uF 50V. Wasted in that position but was all I had. They had been reclaimed from a previous build that didn't work out too good so they had real short leads but they just fit.