Need Help Trouble shooting

It could be a defective cable. Happened to me on several occasions. Try another pair. Good luck, Dave

I did a bit more trouble shooting
and swapping out the interconnect from pre to cdp caused the hum to switch to the other speaker ??
I swapped amp tubes from side to side (monoblocks)
I swapped tubes in my pre amp no difference the hum still exists

Maybe it could be the source
If I hooked up my tuner and the hum disapears is it safe to say it's the source or tubes in the source

If I hooked up my tuner and the hum disapears is it safe to say it's the source or tubes in the source
Musicfile (System | Threads | Answers)

Yes. It could be either. My guess is a tube in the source.

If you swap in the tuner, and the hum still exists, and the hum follows a tuner>pre IC swap, then it's the IC as Dopogue suggested. Be certain the arrows on your ICs are pointing toward the preamp.

Thanks
It's not the interconnects for this testing I put in another pair of interconnects and the humming still exists

Anyone know what tubes go into an Exempar Denon 2900
Is it easy to swap these out

This link to the Exemplar Denon 2900 lists the tubes used. I owned one of these players. Swapping the tubes is easy. You just have to unscrew the top cover and remove it to expose the tubes.