Just found out my pinch roller shaft (Axel 1.067.170.10) looks like a little bent when I put the pinch roller in (Athan corp) There is a lot of friction there. No amount of oiling would not help the situation. So ordered the part from audiohouse CH. Also the Capstan motor shaft is shiny. I was told by JRF that Athan corp is the best motor rebuild guy in the US. Do they also do complete mechanical and tape path rebuild if you send them the whole deck? (tension, pinch roller pressure brakes etc.)
The problem I am having is when you press against the playback head while a test tape is playing, on channel 1 it increases 1db-2db at 1KHz. Channel 2 is stable no issue. Headblock was at JRF and he has tested on a Studer A810 he had in his shop and he says it's very stable on both channels on his machine. He said it was well within Studio specs. So we feel that it is something to do with my deck. So I need a complete mechanical rebuild done including the motors.