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In Reply to: RE: Back to ask again (long! sorry!) posted by author@escapeclause.net on March 17, 2009 at 13:46:17
This sounds like static building up on component inputs. Many components will have output and input coupling caps, if they go back to back (output cap to input cap) a static charge can build up. Most manufacturers take care of this by puttung a high value resistor to ground on the input or output. IF whatever is causing the static charge is dumping more current into the system than the "bleeder" is bleeding off you can build up a charge.
The interconnects could be acting like antennas and be the source of the charge. Disconnecting the interconnects then lets the bleeders do their job and bleed off the charge.
Now the source can be practially any source of EM field, radio station, TV station, cell phone tower or even power lines.
It could be made worse by a bad (or non-existant) ground connection of your AC wiring. Thats why the question else where about the ground rod.
If your friend's house you tried this at was in the same development built by the same builder the house might have the same problem. Or you both might be close to a cell tower etc.
It could also be caused by an outside connection to the system. Cable TV is ther most notorious. If you you don't have cable thats not it!
John S.
Follow Ups:
I had cable and did not have problem. Then we had a problem with the set top box and a tech replaced it. After that I had problems, not realizing the connection at all to the CATV, for over a tear. It would come and go. I did finally eliminate the ground loop but I still have a messy AC line. We live in a city neighborhood of very old houses, some rehabbed but many old multi-family hatchet jobs of old homes.
Maybe you think you don't or you couldn't have a ground loop problem. It doesn't have to be CATV related.
Do you have three wire house wiring? Is the conduit the ground? Bill
...the rest of the house is two-wire, with three-prong outlets that are, in the words of my electrician, "just for show."
There seem to be lots of problems with my electronics, spanning different types of components and different configurations of gear. The CD player's power transformer gets burn-your-fingers hot after a few minutes of routine operation, the preamp makes an enormous bang if unexpectedly disconnected from AC, the power amp makes a transformer hum in both the speakers *and* through the front apron, and the DVD player makes its own kind of bang, totally at random, during playback.
Some kind of power issue, as a root-cause? Other thoughts?
you might try these components in different outlets in your house to see if it does the same thing get hot ect.Im not an electrician but it would be nice to find an outlet that doesnt mess with your components.then the electrician could trouble shoot better?
dvd audio rules
You have had an electrician check out your home wiring? Let's just say the problem is no where else. Let's just say for sake of argument that it must be the electrical system. Now, what could it be? You have overheating electrical components and other symptoms, physical symptoms. Let's set aside the music becoming unlistenable for now. What defects in a home electrical system would overheat things? Some of the things you describe might be from a really bad ground loop. Something in you home may be dumping alot of DC. I don't know myself but by focussing on the electrical system you may get some answers here and elsewhere. I think you need to get an electrician to troubleshoot all the legs of your home electrical system. The lack of a modern ground system may play a roll. The voltage in your home may be wrong.
I'm just brainstorming. You said you are tapped out financially but it seems that that electrical system needs to be checked again. Are you having trouble with any appliances? Computer?
There is a cause for this problem, it's just showing up in your audiophile components. It's a clue that ALL of your components have symptoms. The overheating (if it is actually unusually hot, maybe it should be hot. See what I mean? No assumptions) is a clue. Let the facts and only the facts guide you. Write them down.
Of course, I know you've said that you've run your system at another location. I just don't see how the interaction between your components could be so bad as to cause these problems. (Assumption on my part, not knowledge) Another poster mentioned that this may be a problem in the neighborhood grid. Does this problem show up in any other stereo system?
The main thing I'm saying is to be very rigorous as you try to diagnose the problem. Make no assumptions. This is a real puzzler.
Bill
Would it make any sense for me to post some pictures?
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