I posted last May about a custom 6sn7 preamp that was runnnig too hot and had a few cap failures. Here is an update,
So after another failure due to heat(burnt resistors), I took it back to the engineer for a power supply rebuild. Redesigned power supply in a separate box with 5AR4 tube rectification. Preamp box uses 0A2 and 0B2 tube voltage regulators. Runs cool and so far so good.
Thomas
"In a democracy, uneducated voters get the leaders they deserve."
