Quote:
Originally Posted by DaveWM
hmmm, maybe some kind of rigged up focus control. need more can you tell where each lead goes and I will see if I can find out whats going on. the Lin pot is a cathode bias pot, pin 9 to ground.
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OK, I traced the two leads coming from the pot. Black goes to ground, red to the post marked "B+ 400 2" the orange and white wire jumps it to another post, then to the electrolytic as described previously. The circuit board path, I outlined with the red line, takes it to pin 9 on the audio out tube, 6BQ5.
Huh?
Tone control, maybe? I thought this might be an audio pot, at least it is similar to tone control pots I've seen in old tube amps.
I really don't know.
Let me know if this picture helps, or if you need me to take some other detailed shots.
05-06-2010, 01:21 AM
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