|
Home
/ FAQ
/ News Classifieds / Events |
Audio Asylum Thread Printer |
Get a view of an entire thread on one page |
173.18.35.33
I have yet to achieve a silent, non-humming, system in my listening room. Pertinent facts:
1. Our house is 5 years old.
2. I have a dedicated isolation transformer (5kva) for the audio equipment
3. I have a dedicate sub-panel that is fed by the isolation transformer
4. each piece of equipment is on its own circuit breaker
5. The system uses balanced cables
When using a line-input (read CD or tuner), there is a slight buzz (not hum).
When using my built-in phono stage, there is a material hum (not buzz). I have tried every conceivable tweak, changing wires, floating AC plugs, etc.
Upon inspection of the ground copper rod that is in the earth, I noticed that the rod could be easily wiggled, with about 1/2" movement (left to right).
So, I am wondering if my hum/buzz problems are ground related and in particular, the ground rod itself.
Is there a way that I can test to determine if my ground is good? Are there any suggestions on some tests that I can run to help alleviate the buzz and more importantly, hum on my phono section?
Thanks in advance.
If the Iso-former only isolates hot and neutral but not ground you've created a ground loop. Lift all the grounds with cheaters to verify as the other poster said. Good luck!
ET
Question "Authority", the mainstream media sucks - Go Independent and hold BOTH parties accountable instead of just the other guys!
I need music to help forget the reality of today
Very well explained and detailed. When chasing hum and noise, I would try to test separate components from each other. If you have headphones and a preamp jack this also is a good aid.
Systematcally build the system up, connecting the minimum.
Almost best to disconnect any preamp from your amps, and listen to the speaker for noise/hum. This was it rules out the amp, preamp interface.
Phono hum can often be the turntable itself, the cartridge and platter interacions, and sometimes pretty bizarre interactions.
Carefully move your cartridge over the platter and see if the hum level changes, be careful of the needle. If you dont hear any change, the arm, platter magnetics are not the problem, or at least not showing itself.
The last resort Cheater Plug method can eliminate coupled Chassis/safety and DC ground interactions.
The electrical purpose of the ground rod is to divert faul currents, lightning, and provide a reference for the neutral wire from the power feed.
A certified electrician can probably re-connect the often lossy compression adapters used in residential ground systems, cadweld's common in Telecoms are one good tweak....
Good luck!
Post a Followup:
Top of Page ]
[ Contact Us ]
[ Support/Wish List ]
[ Copyright © 2009, Audio Asylum, all rights reserved ]
[ Go Green ]
[ Take5 ]