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Strange problem with new build
Posted: Mon Jul 12, 2010 7:26 pm
by Vegard
Ive just finnished my third 12000 series, but I have some problems with this one.
I cant get any sound out of it! When I crank the volumes to 10 i can hear the guitar, but its very very quiet.
All voltages are fine on the pins!
So far I have:
Double checked wiring
Re-flowed turrets
Tried different tubes
Compared wiring to my other 12000 amp
470Ohm resistor is also correct
Re: Strange problem with new build
Posted: Tue Jul 13, 2010 5:34 am
by vanhalen5150
Check cables and input speaker jacks with another amp. Recheck your OT wires.
Re: Strange problem with new build
Posted: Tue Jul 13, 2010 12:07 pm
by vh junkie
Make sure pins 4 & 5 (red heater wires) of v1-v3 are jumpered at the sockets... post pics...
Re: Strange problem with new build
Posted: Tue Jul 13, 2010 1:16 pm
by VelvetGeorge
Do you hear a sound when you touch plate terminals with your meter?
Start at the output tubes and work your way backwards through the amp until you don't hear a sound when you touch your meter lead to the plates.
george
Re: Strange problem with new build
Posted: Tue Jul 13, 2010 1:41 pm
by Vegard
Thanks for help
I hear a sound when i touch the plate terminals with my meter. I am at work now, but if I remember correctly the "sound" stops at V1. I have also tried tubes that I know works.
Re: Strange problem with new build
Posted: Tue Jul 13, 2010 6:39 pm
by Vegard
I fixed it! The 100k resistor on the pins in V2 was installed wrong : )
Re: Strange problem with new build
Posted: Wed Jul 14, 2010 2:14 pm
by robert
Good ol' Larry, I hear you...
