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Thanks! I'll go for the higher current capacity. Not interested in blowing up trannies. The toroidal is really interesting - they're my preferred choice for...
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Picking the right PT - check my math!
Hi all. I'm trying to choose the right PT for the current amp experiment I'm working on. Here's the setup:
2 EL34s, biased high class AB (~48mA)...
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Thanks, R.G. I was considering a separate heater transformer. I didn't think about saturating the PT - glad you pointed that out. Probably easiest to use...
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Power transformer & lowering heater voltage?
Hello! I have a power transformer from my old MusicMan HD130, and I'd like to use it for some low-power SE tube amp projects. The HT rectified is 237VDC,...
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Yeah, those are definitely issues I've thought about. The voltage doubler produces 473V unloaded, so using a resistor divider (like most tube power supplies)...
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Converting a Music Man HD150 into an all-tube combo
I've had a Music Man HD150 2-12 combo, 150 W since the early 80s, when I used it for acoustic and electric folk-rock gigs. Since then, I've moved to all tube...
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OK, I really like these protection schemes, since I'm playing around with output section topologies using 2 EL34s and 2 6L6s. The OT is from a 30 yr old Music...
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Output transformer Music Man 2575 150W specs?
Hello all. Anyone know the primary impedance of the Music Man output transformer for the 2575 chassis (150W)? Transformer number is 200-130. I measured...
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Thanks! It should be fairly simple. The bias is set with a 33k resistor in the power supply, so it delivers a -14V to the bias point. So I'll get a 50k cermet...
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How to add bias adjustment to a Mesa 20/20 amp?
Looks like the fixed bias is at -14V. Anyone do this? How did it work out? Being able to optimize the bias for EL84s seems to make sense to me, but maybe...
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Has anyone built a 5B2 Princeton?
I've seen a few 5C2 builds, but no B builds. A friend has a 5B3 Deluxe, and it's easily one of the finest sounding amps I've heard. Comparing the B to the...
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