Aha!The 4 12AX7's would have been Telefunken (which explains why they are missing!).
Look how the 6D10 protrudes beyond the plane. Is this how yours looked? Am I missing a shield? (see attached photo)That multiplex unit on the back is original too but there would have been a shield on that tube.
P.S. Appreciate your saying something on the challenging, cramped quarters. Fortification for what's ahead.
really depends if the transformer windings can support more load. If the transformer can't give more than the tube can pass, changing the tube for a solid state rectifier won't get you anywhere. If the transformer can give more, than an SS diode with a suitable drop resistor to put the voltages back right might be a solution.
OK. Sounds good. I'm making note of this for later-stage.
Thanks!
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