Crate Vintage Club 50 VC5310

[rockon1]

It has 4 EL84 tubes and 4 12AX7 tubes.

2 EL84s per channel.
I -think- the 12AX7s are
1: chan 1
2: chan 2
3: reverb
4: PI

could be wrong though.


-Tim

Point of clarification. 4-EL84's all running in a "mono" power section all the time. I do not think the reverb is tube driven either though I may be wrong on that one. Bob

[timt]

i believe you are correct, i was thinking of my maverick.

the crate doesn't have tube reverb.


i still find it strange that this thing just magically works again.
going to get that tp17 reading later today but i suspect it will come out fine.

maybe it really was just bad tubes and caps. some of those caps were horribly bubbled out about to explode.

[rockon1]

i believe you are correct, i was thinking of my maverick.

the crate doesn't have tube reverb.


i still find it strange that this thing just magically works again.
going to get that tp17 reading later today but i suspect it will come out fine.

maybe it really was just bad tubes and caps. some of those caps were horribly bubbled out about to explode.

BTW only the plastic covers bubble out on them usually really. I actually took the bubbled top off one of the "bubbled" caps my VC50 head to check them and they were fine underneath. If you think about it they would have burst if they were actually bubbled. Heres a picture. Bob

[timt]

I checked TP17 and got -15.29V (after resistors 41 and 42) and -15.28V at jumper 01 to B-, which is almost to spec of -15.6V. Volume is turned to off though.


I also was not positive the caps were bad, I didn't really bother to test them.

I had a computer repair guy walk by and see the caps and they mentioned having experienced bubbled caps on pc motherboards exploding (breaking open) in a similar fashion. They recommended changing the bubbling ones out just to be safe. Channel 2 worked more reliably after I did that though.


attached are picture of the larger caps that bubbled.
the exact same type of caps were on the other side of the board and were not bubbled (replaced those for the heck of it too).

I was told that after about 10 years capacitors tend to drift and should be replaced. Is that true?

[kmac4648]

Thank you, Garydean!
I also have been searching for this schemo!

[fede_t88@hotmail.com]

Crate VC-50H Schematic

Someone can give me the crate VC-50H schematic?? i need repair it.... POR FAVORRRR!! LO NECESITO!! Thanks!... Gary's link is broken..

[Enzo]

Gary's link opened instanly for me just now.