At low volume you could hear this bzzzzzzzt as the note decayed. In this amp the transformers and speakers are original and that is a miracle at 49 years.
Even a Stradivarius has a new fingerboard if it' been played." Enough said! My job is to keep important parts like your priceless transformers safe. His words: "If it's old it's been worked on. Had a private audience with George Gruhn last month.
If your customer freaks out about a change like this, you don't need to sell your amp to that person. The fear to alter something to make it ACTUALLY WORK properly. My opinion? Screw your 'originality' and put a trim pot in there! Running this amp this hot could kill the output transformer and possibly the power transformer! I was alarmed at seeing this but I've seen this many times before. These early models don't have a trim pot for bias. First, the Russian tubes were biased hot. Once I got into this amp, and it was gone through by what I assume is a good tech, I found a few issues. The unreasonable fear of 'originality' and 'collectibility' and what that does to a technician. We're not going to load up a Rolls Royce like this with cheap new glass. The lovely Mullard 5AR4 tube was destroyed so I found a good deal on a NOS one. A couple filter cans were damaged and some components became unsoldered. So this amp required quite a bit of gluing and clamping. The company he bought it from are good people and they payed the bill right away.
Fortunately, everything was fixable and my client decided not to send it back.
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