Ewww... Two day after testing the amp for the first time, the right channel just ceased working. I'm stuck, because the problem seems particuliar, and I am ignorant at electronics. Thus, I'm asking help from you electronic gurus.
Here's the matter :
V1 belongs to the right channel, and V2 to the left channel. The problem doesn't come from the tubes themselves; I have switched them, changed them, nothing works.
When the tubes aren't plugged in their sockets, I have 48 V of voltage between pin 1 and the ground, for both sockets.
But, with tubes plugged, the voltage between pin 1 and ground, for V1 only, progressively goes down from 48 to 24 V, while the voltage for V2 remains good (48 V between pin 1 and ground). And I have no sound in the right channel.
Can anyone help me ? Any piece of advice would be very much appreciated.
Stupid me. Unable to figure out the problem, I checked all the solders and made them cleaner. It was just a fraying cable going to the ground that was touching R3's lead to Q1.
Edited by Oeufdepoire - 1/19/13 at 10:23am