System feedback coming thru speakers.....help

How close is your turntable to the components of your rig & what's the room config. Back in the 70's I had a smallish room & the turntable wasn't isolated enought from the amp/spkrs & perhaps vibration was the culprit & I experienced the same - at least that's what I surmised at the time it & more space & isolation of each piece solved the issue. happy listening!

Ok, update: Yes, I am using a 3 to 2 "cheater" plug/reducer right now. My electrician friend is coming over tomorrow night to look into my electrical scenario. Not pleasant to say the least.
I did open up the pre amp. It looks like tubes 4,5 and 6 are all in correct spot, as I can clearly read the white lettering on the signifying the model. Tubes 1-3 unfortunately are illegible. I did, however, place them in the spots as was indicated on the tube boxes that came with the PV 11 when I purchased it. I have the entire system (just amp, pre and cd/DVD) out in middle of room. No crossed wires, no other issues. I've tried other cables, I've plugged the DVD into a different source on the pre amp......same results.
I made mention Arlie's of it sounding "fine" at lower level......not the case......just at low volumes more difficult to hear the static/thumps.

If the preamp can make the sound smaller or bigger...but the preamp and amp are silent with no source attached to it no matter how loud you turn the preamp...then it has to be source. And is probably not grounding. i did not think grounding would get louder and softer with volume.

Might be your source or your cable in between your source and preamp. Try a different cable. If same, then try another dvd player. Hope the electrician can help.

I've plugged the DVD into a different source on the pre amp......same results.

What you should try is a different source component, such as the cassette deck. Connecting the same source into a different input of the preamp doesn't prove very much.

I made mention Arlie's of it sounding "fine" at lower level......not the case......just at low volumes more difficult to hear the static/thumps.

That's different. Given that, I agree with Lloyd that the problem is upstream (ahead) of the volume control in the preamp. Meaning that it is being caused by either the CD/DVD player, the interconnect cable between it and the preamp, or by preamp circuitry (or tubes) that are "ahead" of the volume control.

I've included the preamp circuitry that is ahead of the volume control on that list of suspects, even though no symptoms appear when nothing is connected to the preamp inputs, because it is possible that a problem in that circuitry might not manifest itself under zero-signal conditions.

Regards,
-- Al

Lloydelee21, the standard procedure is to disconnect everything except the amp to the speaker wires. Turn on the amp. Do you have any noise? If you have noise with just the amp on, it is your wiring in the house. If not connect the preamp to the amp. Turn on the preamp and then the amp. Any noise? If so, it is your preamp or the interconnect wires. If not, connect one source and turn everything on. If there is noise, it is either that source or the interconnects to the preamp. If not, add the second source and turn everything on. If noise is present, it is that source or the interconnects to the preamp.

Actually, I think it is just a cold solder joint in which ever component you identify as the culprit above.