macrae11 wrote:Would it be possible for you to explain these things in slightly more english like terms?
eg, What is B+? I know what bias is, but what would cause it to be severely out of whack? quad? on the clean channel, I'm assuming you're just talking about volume, not breakup? Or are you talking about volume before breakup? Where does the clean channel start to break up? For the overdrive channel, what is it about the way it's breaking up that you don't like? What kind of guitar were you using? What speaker cabinet?
Back in the early days of thermionics, batteries powered the system. The 'A' battery was used for the filament supply, the 'B' for the high tension plate supply and 'C' for the negative bias voltage. Many guitar amps refer to the B+ supply simply as HT as in High Tension.
Any part of the bias supply chain not being up to par could cause it to be out of whack, in my case it was a dead spot in a trim pot from non-use and shelf life.
Quad referring to the quartet of kinkless tetrodes providing the 100 watts of class AB output power in the PA section.
On the clean channel a simple lack of gain affecting both overall volume and break up. I'll know where it starts to break up once I have corrected the gain issue. Likely something as silly as an error in magnitude on a resistor or something.
On the OD channel, the distortion was simply at times non-linear.
The guitar was a PRS stink ash.
The cab was a 1960A.
A.