Recent content by dontvex

Happy for your nice collection but neither Fluke nor Simpson do currently produce a LCR meter and the HPs are definitely overkill for the discussed application. So, what you got? HP4263B? Fine, now you have one more least significant digit to know your cap is bad. Congrats. Hint: OP is not...

If somebody replaces the caps on their 32 year old amp and the pulled caps test bad for the most part, then doing a cap job is absolutely called for. It is at that point the right thing to do if you want your equipment to be reliable and to sound as intended by the designer. No two ways about it...

Been there. Me and the guitarist in that band ended up rearranging the setlist so all the E songs and all the Eb songs are "en bloc". Just one quick re-tune about halfway down the list. No extra pedals and no second basses/guitars to schlepp.

If I'm not mistaken it's actually nicely thought out according to the schematic: 4 windings on the OT's secondary: - 3x 4R output to switched speaker jacks where each jack switches on a pair of output tubes (via cathode to ground connection) when plugged in - 1x dedicated NFB winding So it...

If you don't need every last bit of headroom and don't mind a little more compression, you could also insert some resistance between each of the power tubes cathodes and ground. Select an ohms value for each resistor that gets the plate dissipation down to your desired bias percentage at idle...

Specced tubes for the 400PS were GE6550A, an improved version of the standard GE6550. More details here: http://www.timeelect.com/6550a-ex.htm