Heeeeeeeeeeeeelp MyTC15
You name it has happened to my build.
Starting up no sound, filaments on the rectifier tube and output tubes light up, no snap crackle or pop, no smoke, smell or excessive heat.
Checked speaker and Cable with another amp A-OK
Checked Cable to input jacks A-OK
Heater wire 6.3 VAC, did not check B+, check V4 and V5 both pin3=7 , pin7 =365 -7 or something?
V1 pin1=143, pin 3=1.34, pin6= 144, pin 8=1.348
V7 Amperex EF 86 = Pin1 77.0, Pin3 1.9, Pin6 115, can’t remember pin 7.
Filaments on V2 and V3 went out, no heat coming off of tubes, brand new Sovtek 12ax7 down the tubes, pun intended
Took amp apart, check jumpers under board, bad jumper, no continuity, and rewired and soldered all.
Took wires off of tube sockets and soldered all and checked continuity, replace all12ax7 with Masa 12ax7a
Turn on Amp, constant hum, checked all grounds tighten all stars grounds, replaced all shield cable. Took all tubes out one at a time except V6 still had hum
Audible snap and sound level when switching crunch munch switch, audible sound level when turning VMR it worked I think. , No sound level change when turning volume knobs.
Turn off Amp and went out and had a lot of beers.
Next day sobered up and took some reading on the amp
HVAC 118, B+ 322/304, All heater 6.2
V1 P1=144, P3=134, P6=144, P8=13.48
V2 P1=252
V3 P1=267 Way too hot
V4 P3=13.1, P7=307
V5 P3=13.1, P7=304
V6 P2=112, P4=290, P6=296, P8=112
V7 P177.0 P3=1.8 P6=115
PT red wire to p4 and 6 V6 =304V
I have lost my Amp guy who was suppose to help me and have shut everything down because the numbers look too hot and I didn’t want to burn anything up. When I did get sound (hum),I didn’t do anything it just started to hum.
Oh, Caps all 5 450V =23.7 from left to right
220uf 50V=.10k
22uf 50V=1.52
22uf 50V=1.53
22uf 50V=2.29 Hope I’m reading my meter right
Thank you all for any help you can give me, I don’t have a camera to post pictures
The best to all of you
Dave from Portland Oregon
Just started up my TC15 again No hum, no sound
Question:
On V2 is there a jumper between pin 3and pin 2?
Saw the pictures of Stephen's Tone contour where there look’s like
a jumper from pin 1 to pin 7, does the wire go from pin 1or 7 to330k on the board?
Thank you
_________________ Love is a small Cat on your amp purring as you play
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