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I don't have my schematic written down. It's similar to the sophtamp, but he has the biasing all wrong and when built to his schematic you get lots of degradation in the higher registers. You can barely hear the top 3 strings of a standard 6 string guitar. The power tube is literally on the verge of shutting down. One more note: Don't use lithium! They explode when discharged too far. Maybe try NiCad if you are going for higher power density. I just use small lead acid deep cycle batteries.
always wanted to do a tube amp with lithium battery nice
Very cool, John. Do you have a schematic for this circuit? I've built a few tube amplifiers (Kalamazoo Model 1, Fender Princeton Tweed, Fender Champ).
Yours looks like a version of a 1/4 watt tube amp from Ytube, that uses the 12K5 tube along with a 12AU7.
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