Hi all - I've scoured the forum/internet for speaker hum troubleshooting - and looking for any tips any of you might suggest.
It's an original upright Centipede. First, when I turned the sound pot I was getting some feedback and some different levels of crackling and hum levels. So I replaced the sound pot - and now the speaker hum is just consistent - no variability or static, etc.
It was then suggested to swap out the AR board, which I did - a restored board by someone on this forum. Still no luck.
I'm now wondering if it's a ground issue or perhaps a bad speaker?
Just wanted to see if anyone had any good tips from past experience.
Thanks in advance...
It's an original upright Centipede. First, when I turned the sound pot I was getting some feedback and some different levels of crackling and hum levels. So I replaced the sound pot - and now the speaker hum is just consistent - no variability or static, etc.
It was then suggested to swap out the AR board, which I did - a restored board by someone on this forum. Still no luck.
I'm now wondering if it's a ground issue or perhaps a bad speaker?
Just wanted to see if anyone had any good tips from past experience.
Thanks in advance...


