System feedback coming thru speakers.....help

wow, you ALL are amazing! thank you for your advice thus far.

UPDATE: Still not solved, but here is what I have done.
i found a grounded outlet in the house near a brand new washer/dryer my landlord recently had installed. pretty sure it's grounded, it has 3 prong.
I ran an extension cord from my strip to that outlet, still just using the amp, pre and 1 source.....still an issue. I changed source components, I also changed interconnects.....still an issue.
If I turn volume all the way off with the CD player playing, the noise goes away......but when I turn volume up, the noise/static/"pops" present. the louder I turn it, the louder the noises get.
My electrician is coming tonight, but I think less and less that it's the power source....although another grounded outlet is needed in this place! :)
could it be the tubes? i have no idea how good/old/hours there are on them. I do know that the !2AU7's are in correct place.....but not certain if they are all good or not.

HI Jdvorak,

i believe you said when you plugged in just the pre and the amp...with no source plugged or connnected...you could turn the preamp volume way up and there was no noise.

Is this correct?

Lloydelee21, correct. nothing. no hum, no nothing.

And when you do plug in either of 2 sources...from either of 2 plug outlets...into any of your preamp inputs...there is hum which gets louder with volume. And the feedback hum is in both speakers...and also in a replacement set of speakers using the same 'problem setup'.

- not amp or speakers,
- probably not grounding which does not vary with volume
- Normally, 'feedback' occurs when you are outputting sound, and there is a microphone picking it up and feeding back into the same system. i assume there is no microphone input in your CJ preamp
- is it the interconnect?
- is it possible there is a problem with preamp...but you cannot tell if there is no source attached because (as you said, if u plug in source, turn volume down, feedback goes away).

Try different preamp, or try to see if you can plug the DVD source directly into your amp temporarily...some DVD players have a built-in internal volume control...usually terrible but it should work.

Try different preamp, or try to see if you can plug the DVD source directly into your amp temporarily...some DVD players have a built-in internal volume control...usually terrible but it should work.

Or try the cassette deck straight into the amp. It has a level control on the front panel.

Regarding the references to feedback and hum, as I indicated earlier I don't think this is a feedback problem or a hum, ground loop, or grounding problem, based on the sonic descriptions that have been provided. My guess at this point is that it is simply a preamp problem.

Regards,
-- Al