Moderator: longfxukxnhair
What JMD to you have 50 watt or 100 watt? If it's a 50, swap the power tubes and see if the problem moves to the other pot. If it's a 100, swap the left pair of tubes with the right pair of tubes and do the same. If the problem does move to the other pot, you may have a bad tube. If not, something else is wrong (fuse, resistor...). Oh, and yes, the pots do affect each other.WaRLaX wrote:I can get trim pot2 to read 76mv but i get an OL reading on my DMM from trim pot1. I can adjust trimpot1 to get trim pot 2 to read differently. What is happening?
That is correct the inner 2 are paired and the outer 2 are paired. This does not mean that they share the same bias pot, they don't. The two left tubes are on one bias pot, and the two right tubes on the other. That's why I suggested swapping tubes left to right, to see if the problem moves to the other bias pot (follows the tube).sikter wrote:Usually outer tubes are being paired (1&4) and so inner tubes (2&3)
I don't see why would JMD be different. But I could be wrong
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