Hello,

I scored a 6260 the other day. I replaced all but a few of the electrolytic caps in it right away? I also put sockets in so I can upgrade the opamps too. I checked the bias following the directions I've found here on the site. I did notice that one channel was distorting quite bad. The same channel the bias pot won't change the bias no matter what I set the bias pot at. I looked at the output of that channel on my oscilloscope and it appears that a good portion of the waveform is missing. I can't tell if its extremely severe crossover distortion or only half of the phase splitter is working. When I feed it a sinewave the output is distorted on the bottom half of the waveform only. I haven't traced the signal with my scope yet though.

I'm just wondering if anyone is familiar with these issues and has any ideas for me. I was thinking an issues with a transistor in the phase splitter but the bias issues is making me think its elsewhere. If the transistor the bias pot is tied to fails, what would the symptoms be?

I was going to trace a sine wave through the amp with my o scope but my scope seems to be having a issues with its input loading. I don't want to make my problems worse by using the scope in circuit.

Any help / advice would be most graciously appreciated.


Thanks,
Nick