The power supply is common to both channels . digi-key or mouser for cheap power res. Check the conection from power supply and each channel.
All connections are good, checked power resistors all seem to be with in spec. Could I disconnect the power supply from pin 8 on the rectifier to see if its with my trans former.
I pulled the rectifier tube out to check a few things (I don't know if these checks prov anything or are good test) but I had continuity between pins 2 and 8 which according to the schematic from what it shows I should, I did not have continuity between 4 and 6 which it shows I should. To be clear I am not certain that, that is what the schematic shows it just looks like it does to me. I had 385 volts on pins 2,4,6 but not 8 which makes since as this would need the tube in place to get voltage on pin 8. But I am not sure about pins 2,4,6.
I pulled the rectifier tube out to check a few things (I don't know if these checks prov anything or are good test) but I had continuity between pins 2 and 8 which according to the schematic from what it shows I should, I did not have continuity between 4 and 6 which it shows I should. To be clear I am not certain that, that is what the schematic shows it just looks like it does to me. I had 385 volts on pins 2,4,6 but not 8 which makes since as this would need the tube in place to get voltage on pin 8. But I am not sure about pins 2,4,6.
pin 2 with tube removed should read zero or 5 volts ac between 2 and 8 4 and 6 ok for ac voltage . If pin 2 is connected to 4 or 6 and should not be.
Pin 2 has 5 volts ac
Pin 4 has 385 volts ac
Pin 6 has 385 volts ac
pin 8 nothing
Pins 2 and 8 have continuity
Pins 4 and 6 do not, but look like they should or might(according to the schematic).
Pin 4 has 385 volts ac
Pin 6 has 385 volts ac
pin 8 nothing
Pins 2 and 8 have continuity
Pins 4 and 6 do not, but look like they should or might(according to the schematic).
Does it matter which pin these wires are hooked to as far as 4 and 6 goes, I wouldn't think so but just want to verify.
I know its been awhile but did you ever find the cause of the static. My HH Scott 299 has a very sporadic static like you described only both channels
I ended up sending it to a well known tech. I hate to tell you this as this may or may not be the problem for yours. But my outputs were shorted, I ended up buying a different amp from him. He told me that I had a high amperage fuse that could have allowed voltage to short the outputs. The amp was in rough shape and I wasn't out to much. Now that I am listening to sweet sounding music I don't think twice about the issue.
I had static problems with one channel on my 299 and it turned out to be dirty contacts on one of the switches above the volume or tone controls, I can't remember which one but I sprayed some contact cleaner in there and flipped the switch back and forth and it works fine now.
I guess I should clear something up, when I had static I would all so get lighting inside the rectifier tube.
Seems like your tech figured out the problem but maybe scubacurt could try cleaning those switches
That's a good point I forgot about the simple steps first. Hopefully it works for him.
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