Yes they did.Both channels indicates a power supply issue. First suspect would be the +/- 80 vdc power supply. Did the +/- 65 vdc adjust within spec for both amplifiers?
Yes they did.Both channels indicates a power supply issue. First suspect would be the +/- 80 vdc power supply. Did the +/- 65 vdc adjust within spec for both amplifiers?
It normally is. They used the glue to fasten down the heatsink. Sometimes, very liberal amounts of glue.I don't believe that transistor is the problem. That transistor is the protect relay pass transistor.(driver transistor)The glue is around the transistor right next to the big filter capacitors.
Thank you sir, I will look into replacing the rectfier.Should be over 900 available by Monday.
https://www.mouser.com/ProductDetail/Rectron/W04M?qs=sGAEpiMZZMtQ8nqTKtFS/HT54qSStczOxzjEgoH4n8k=
Yes and Yes.Is testing the rectifier easy enough that you can direct me or should I do some research on this?
Thank you sir, I will look into replacing the rectfier.
a couple 100µf@100vdc electrolytic capacitors.
Yes, I used it to narrow down which component in the signal path was causing the distortion. I swapped out pre amps and power amps. With other components the tone generator is clean. Also I have used a tone generator from my phone with the same results.Are you sure the tone generator /sound card isn't causing the distortion?
Great..Yes, I used it to narrow down which component in the signal path was causing the distortion. I swapped out pre amps and power amps. With other components the tone generator is clean. Also I have used a tone generator from my phone with the same results.
Did this ever happen?Thank you sir, I will look into replacing the rectfier.
Not yet, this is where I had to step away.Did this ever happen?
Dave has you on the right path but just a WAG on my part. Have you tried plugging the amp into a different circuit in your house? I had a dimmer switch on a circuit years ago that would play havoc to anything audio related I ever plugged into the same circuit. I pulled the dimmer and all was well. Now back to your regular scheduled program.
Not necessary when switching AC or DC coupling.(Turning amp off of course...