I will be replacing the quad cap for the ST70. I will be using the 80/40/30/20 uF @ 525vDC from CE. While I am replacing this cap, I would also like to replace the two filter resistors. The original layout refers to a 22,000 and 6,800 ohm resistors. So my questions are:
(1) Should I keep the same values?
(2) What type should I use (metal oxide or carbon film)?
(3) What is the recommended wattage rating for each resistor?
The other item I will be replacing are the two 50uF bias caps. They will be replaced with two 100uF @ 100v electrolytic caps. The layout refers to two 10,000 ohm resistors. So my questions are the same as above (1, 2, and 3).
By the way, I was able to bias the amp properly and it appears to be holding. Overall the amp sounds good, although my speakers are old. I am simply doing the above as preventive maintenance.