Matt Mincer
Active Member
Hey All,
I had posted earlier about this 828 and popping in the low filter. I replaced C31, 32, 37, & 38. That took care of the popping but I was getting a ton of wind noise. I replaced all of the 2SC1312s and all of the 2SA725s but am still getting the same noise. I didn't replace the FETs because I don't have them. B+ is stable and it doesn't matter which input is selected. Also, if I remove the pre in/out jumper, the noise goes away, so I'm pretty sure it's on the front end. The noise is coming from both channels equally and volume and balance don't have any effect on the wind noise. A couple possible clues, the left bass pot is noisy though Deoxed all of the pots. The Audio Muting switch causes a speaker pop a lot like the low filter did before the repair. Finally, when I power the unit there's a bit of speaker pop too. Does anyone one have any ideas? My next step would be to recap the whole board but I don't want to do that if there's a simple fix.
Thanks
Matt
I had posted earlier about this 828 and popping in the low filter. I replaced C31, 32, 37, & 38. That took care of the popping but I was getting a ton of wind noise. I replaced all of the 2SC1312s and all of the 2SA725s but am still getting the same noise. I didn't replace the FETs because I don't have them. B+ is stable and it doesn't matter which input is selected. Also, if I remove the pre in/out jumper, the noise goes away, so I'm pretty sure it's on the front end. The noise is coming from both channels equally and volume and balance don't have any effect on the wind noise. A couple possible clues, the left bass pot is noisy though Deoxed all of the pots. The Audio Muting switch causes a speaker pop a lot like the low filter did before the repair. Finally, when I power the unit there's a bit of speaker pop too. Does anyone one have any ideas? My next step would be to recap the whole board but I don't want to do that if there's a simple fix.
Thanks
Matt