I found that thread at the Steve Hoffman Forum. Honestly, what being explained there is beyond my technical knowledge. I like the idea about adding a soft start, but I need to take it to my tech to do that. But do you think adding a soft start will eliminate the arcing?
Is rectifier tube arcing a problem?
I did some research and couldn’t find a definite answer. I have an amp that I tried 6 different pairs of 5U4G and 5U4GB. 3 pairs has arcing (RCA 5U4G, TungSol, Svetlana 5C3S) and 3 pairs don’t (RCA 5U4G with hanging filament, EH 5U4GB, Sylvania 5931). I took the amp to a technician and he checked everything, he can’t find anything wrong. The problem is, I like the sound of the TungSol and Svetlana which both have arcing. The technician said it is ok to keep using them, but honestly I am not too comfortable. But I like their sound. Is it really ok to keep using the arcing tubes? Will it damage the amp?
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Some/most of it is beyond my tech knowledge as well, but I do understand the basics of it. I've relied upon techs/friends to update my tube gear in the past and I gleaned a tiny bit of understanding from doing so This would be good info for your local repair person to read/consider. Until 10 years ago I did not know what the tiny transformers a friend installed on my Dynaco ST70's, being used as mono blocks, were for (power supply chokes). He performed the modifications in 1979, and said that the stock mono/stereo switch/circuit was a bad joke. The improvement in sound quality from the mod was not a slight one. DeKay |
@imhififan thank you. This seems something small and won’t change the sound. min the diagram, I need to add two diodes per tube, am I correct? |
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