Tube DIY Asylum

World's FIRST Dual-Mono Direct-Coupled JJ 2A3-40 Amplifier with a Dennis Fraker L.S.E.S. Supply

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Operational as of 12-01-2016. Mu of 100 Driver tube. L1 is 10 Ohms and L2 is 6.1 Ohms DCR - as B+ filter series-resistances to Finals. Bare chassis is 12 gauge steel, welded corners, weighs 32.5 pounds on its own. 10, 12 and 14 AWG Military Spec wire used, sometimes in mutiples, and the direct couple, easily seen, is made of three twisted 18 AWG pure silver wires.

My experience so far : I will NEVER build a shared-channel-power-transformer amplifier again ( for my own use ) after hearing this dual-mono power supply and filter approach.

Have fun, I am.

Jeff

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