folks, i have a couple of questions based on what different akers have posted above, and in my fish, fish, fish thread. i just got my own 400 (don't know the serial number, but it's about 27K), and am getting everything ready to get it working.
sgmlaw, you said to replace c83 with a y-rated AC suppressor cap. i was going to replace it with a solen PPM, .01uf/1Kv. will that work?
dadbar, you suggested getting a 5k/2W pot to adjust the bias on the 7868s. should i get 4 and wire them in all at once, then adjust, or do them all with 1 pot, replacing the old 5.6k resistor with the correct one that keeps the four tubes balanced and running cool? there's no relationship between each tube that would be altered by the series changeover of resistors, i assume. this would be done after all the rest of the components have been changed.
thanks,
bill