1963 Fender Concert developed buzz.

[rockman627]

AC mains 117
rectifier in 742
rect out 488
CT 488
V8 voltage drop 3v
V7 drop 4v
V8 6 487
4 485
3 484
V7 6 486
4 484
3 483
V6 6 324
3 30
1 340
V5 6 359
3 3
1 366
V4 8 71
6 334
V3 6 381
3 2.1-1.6
1 250-128
V2 8 1.75
6 219
3 1.68
1 221
V1 8 1.75
6 233
3 1.63
1 225

Filter pack:
red 485
yellow 483
brown 450
blue (upper) 404
blue (lower) 404
white 381
preamp 334


Bias readings V8 38.5 mv
V7 36.5 mv
at 220k-220k junction: -58v

[g1]

Those numbers seem good now, depending on what you are using for power tubes.
If you are using 30W 6L6GC type tubes, you are good, maybe biased a bit on the warm side (compared to stock).
Using 23W real 5881 tubes, that would be biased way hot.

[Leo_Gnardo]

FWIW I've seen balancing resistors for series-wired hi voltage filter caps anywhere from 56K (in some old Marshalls) up to 470K. 7M2 seems way out of line to me. Lyle Psionic seems very much on the ball about practically everything - if you're wondering just what it is that you saw post the question on his video. You might get an answer. What's the worst that could happen, nothing? In any case I'd select a resistor pair in the range mentioned above and stop sweating over it. "Close enough for rock 'n roll."

[g1]

FWIW I've seen balancing resistors for series-wired hi voltage filter caps anywhere from 56K (in some old Marshalls) up to 470K. 7M2 seems way out of line to me.

see his edit to post #28, the bleeders were found to actually be 220K.

[Leo_Gnardo]

see his edit to post #28, the bleeders were found to actually be 220K.

Whew, that's more like it. OK, on with the show!