B+ fuse killer

[Guitarist]

EDIT: What I thought were FREDs from ages past were "whatever" failures. Replaced with 1N4007 and all is well. √

Just did a rebuilt on an amp that's been out of the rig for a while.
All tubes unplugged, Bias disconnected, so it is just the first 2 banks of filter caps with a fender choke.
Ohm meter from B+ point "A" to ground sometimes displays -ohms that climb slowly through zero and up...
There should be 220K as the two sets of bleeder resistors are goign from + the cap's + to ground.
Could this be shorting filter cap (JJs) and is so which one?

Not too fun. so far 2 diode rectifier by the way.

thanks a mill.

[Enzo]

Your ohm readings will not look right for those bleeder resistors because they have the large electrolytic caps in parallel. ANy residual voltage in the cap will make the ohm meter show "negative resistance." When measuring a resistor with a cap across it, the discharged cap looks like a low resistance to the meter since it takes the meter's testing current to charge itself. As the meter charges the cap, the resistance will rise until it hits the resistor in parallel.