System feedback coming thru speakers.....help


I just hooked up my system that I have been building for several months and I am getting some feedback out of the speakers. I ended up hooking up a different speaker and it still is doing the same thing. The speakers are all static-ie and the signal seems weak. Here is my system:
Sonograph SA 400 amp
CJ PV 11 with phono
Thorens TD 160 turntable
Hales T 3 speakers
Nakamichi dragon tape deck
Panasonic DVD S 53 as cd source (for now).
Just had a pair of audio quest bi wire speaker cables made today.

Any ideas?
Additional note: I am in a really old house......like late 1800's. Old wiring, two prong, pre grounding even. Could it be:
Line noise?
Cables touching behind my system?

Any suggestions would be greatly appreciated.

Thank you in advance!

Jason
jdvorak
Hi Jason,

Wow...sorry to hear...and lots in your description to 'chase down'. Lets start with the basics...discconect the turntable. there is lots that can happen there we should isolate. Does the system still have weak signal and feedback without being hooked up to the turntable or the turntable even being plugged in? (ie, thru the DVD player)?

If you turn the DVD player off, and just have the preamp and amp on...do you stll get feedback/static? If yes, then it is somewhere in your preamp or amp. Turn your system off...turn back on just the amp. Still any static? If not, it could be the pre or the cable inbetween pre and amp. If yes, it could be the amp...or the wiring in your house.

If you can try to do a few of these 'easier' isolations tests...and post them back, maybe some of us can help.

good luck.
All great points, Lloydelee21! I actually did some additional reading on here late last night and did some of your suggestions early this AM.
So, when having just the amp and pre hooked up and turned on (CD/DVD still connected but now turned on) there is no feedback, even turning volume up on pre.
everything else is disconnected from pre, as well as power. I also disconnected tv power, etc from system.
I DO have a power strip in place as the outlets are all two prong in this house. SO, I have to have a "3 to 2" reducer on the end of the power strip.
still getting same thing! ugh! if volume just barely turned on, music is fine. but as you turn it up to even 9 o'clock, the woofer starts to "pop" and there is static coming from mid and tweeter......both speakers!

I am not certain how old tubes were with pre amp, but I just put them in, and they (I believe) were well labeled for placement (I never put tubes into a pre before).

additional thoughts?
To make sure i got it right...pre amp (on), amp (on), DVD (connected but off), turntable (disconnected and off)...no buzz no matter how loud you turn it up. That's GOOD. Once you put the DVD on, you get noise? If so, it seems to be either: a) the power strip, b) the connection between the DVD and the preamp (ie, the cable or the actual RCA in-jacks in your preamp...try different onces), or c) the actual DVD player itself. Try to avoid the 3-2 reducer on the end of the strip...it means you have no ground. that could be part of your problem?

If your amp and preamp run thru power strip just fine...plug DVD player separately into wall direct and see what happens.