Two different plate voltage readings
Moderators: pompeiisneaks, Colossal
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Stevem
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N
Do yourself another favor and get 4 new screen resistors and move them from the board to each socket where they should be!
When I die, I want to go like my Grandfather did, peacefully in his sleep.
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
Not screaming like the passengers in his car!
Cutting out a man's tongue does not mean he’s a liar, but it does show that you fear the truth he might speak about you!
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martin manning
- Posts: 14064
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- Location: 39°06' N 84°30' W
Re: Two different plate voltage readings
Why? It seems to be working fine now. My vote is to change the filters, which will probably restore some low-end punch.
Re: Two different plate voltage readings
Thank you, everyone. It's running great now! I'm getting plate readings of 455.2VDC across all four tubes. I can't get the bias into 60% range, but it's not too hot. I run the amp at 117VAC line input, which put the bias at 42mV. I'd still like to get it down a bit though. I was going to increase the "fizz" cap to 110pf, but I'll try a 5751 or 12AT7 as a PI first. I'd also like to replace the Marshall V30's with G12-65's.
I have to say... The Marshall 6100LM is one hell of an amp! From cleans to crunch to crush, this thing destroys!
I have to say... The Marshall 6100LM is one hell of an amp! From cleans to crunch to crush, this thing destroys!