Hello Blw:
I purchased a used c-j premier 15 from my dealer about two years aso (at that time my unit was one year old). I experienced exactly the same noise issues that you describe. I finally replaced the stock tubes with NOS tubes from Upscale Audio (ask for Kevin). Once I installed these NOS tubes, problem solved - the noise was GONE. My unit is now very very quiet - still some residual very low level noise, but MUCH MUCH MUCH less noise than with the stock tubes installed.
Good luck with this unit.
Regards
I purchased a used c-j premier 15 from my dealer about two years aso (at that time my unit was one year old). I experienced exactly the same noise issues that you describe. I finally replaced the stock tubes with NOS tubes from Upscale Audio (ask for Kevin). Once I installed these NOS tubes, problem solved - the noise was GONE. My unit is now very very quiet - still some residual very low level noise, but MUCH MUCH MUCH less noise than with the stock tubes installed.
Good luck with this unit.
Regards