brennansrevenge:
As an engineer, you should know that the best way to solve a problem is to approach it with a process - a logical process. Based on your posts, I have the impression that you are not doing this. You need to calm down and focus.
Everyone trying to help you is at a real disadvantage - we cannot see the amp. You have admitted to changing out some amount of the circuit and even though you swear everything was changed correctly - at least I have a great deal of doubt. And let me give you the reasons: 1) you don't recognize an inductor. 2) You are using a schematic for an amp that you don't have and may not realize that. 3) You are measuring things that have nothing to do with the problem at hand. and finally 4) the amp would be working if everything was indeed correct.
One good thing is that the schematic is not going to be that far off in the bias circuit - the circuit with the problem. In order to be burning up R43, there has to be a short circuit to ground somewhere in the bias circuit - and I emphasize - NOT the heater circuit, NOT in the B+ supply and certainly NOT in the circuit around the middle control.
We are only concerned with the bias circuit - that starts with the red/black transformer lead, through R43 and CR1... and further includes C15, R44, R45, C16. This circuit also includes anything attached to point "E" on the schematic (R29-R34... etc).
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Ok. This is the first thing I would do to track down the problem.
Did you put a replacement for R43 back into the amp? If so, take it out.
Then measure the resistance from that R43-CR1 junction to ground (the amp chassis) and tell us what it is.
The reason I want to know this, is that in order for R43 to pass sufficient current to burn up, this location should show a very low - possibly zero resistance value.
I'm also assuming that R43 and CR1 attach to the same terminal strip lug. If this is not true, then let me know.
Wish us luck!
