Unexpected ground loop source

joeparaski
joeparaski Posts: 1,865
edited July 2009 in Troubleshooting
Alright, after doing some research I bought a ground fault detector and a low-voltage detector and got to work trying to find the source of the buzzing sound.

One of the tips was to disconnect everything and plug stuff back in to try and isolate the offending component.

I've got a lot of components, but I did find that 2 of the Bose 1801 amps were contributing to the buzz. A couple of cheater plugs solved that problem but there was still a buzz present when the Samsung t.v. was plugged in.

What?? The t.v!!!??? Even when it's OFF!!!!??? Amazingly the Samsung plasma causes a buzzing sound in the speakers even if it is off. I tried plugging the t.v. into a completely different circuit from the sound system and it still does it!

Joe
Amplifiers: 1-SAE Mark IV, 4-SAE 2400, 1-SAE 2500, 2-SAE 2600, 1-Buttkicker BKA 1000N w/2-tactile transducers. Sources: Sony BDP CX7000es, Sony CX300/CX400/CX450/CX455, SAE 8000 tuner, Akai 4000D R2R, Technics 1100A TT, Epson 8500UB with Carada 100". Speakers:Polk SDA SRS, 3.1TL, FXi5, FXi3, 2-SVS 20-29, Yamaha, SVS center sub. Power:2-Monster HTS3500, Furman M-8D & RR16 Plus. 2-SAE 4000 X-overs, SAE 5000a noise reduction, MSB Link DAC III, MSB Powerbase, Behringer 2496, Monarchy DIP 24/96.
Post edited by joeparaski on
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Comments

  • Polkie2009
    Polkie2009 Posts: 3,834
    edited July 2009
    I've read here on the forums that the RG6 coax cable from the cable tv service can sometimes cause noise problems.???
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  • kawizx9r
    kawizx9r Posts: 5,150
    edited July 2009
    If thats the case, run the coaxial cable through a power conditioner if it has said in/outputs maybe? Mine has ins/outs for that and telephone plugs too, but I just dont use them.
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  • joeparaski
    joeparaski Posts: 1,865
    edited July 2009
    I don't have cable tv service so I don't have a coaxial cable. Very strange, the buzz gets noticeably louder when the t.v. is physically plugged into the wall outlet.

    Joe
    Amplifiers: 1-SAE Mark IV, 4-SAE 2400, 1-SAE 2500, 2-SAE 2600, 1-Buttkicker BKA 1000N w/2-tactile transducers. Sources: Sony BDP CX7000es, Sony CX300/CX400/CX450/CX455, SAE 8000 tuner, Akai 4000D R2R, Technics 1100A TT, Epson 8500UB with Carada 100". Speakers:Polk SDA SRS, 3.1TL, FXi5, FXi3, 2-SVS 20-29, Yamaha, SVS center sub. Power:2-Monster HTS3500, Furman M-8D & RR16 Plus. 2-SAE 4000 X-overs, SAE 5000a noise reduction, MSB Link DAC III, MSB Powerbase, Behringer 2496, Monarchy DIP 24/96.
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  • kawizx9r
    kawizx9r Posts: 5,150
    edited July 2009
    Is the tv....3 prong? There might not be a proper ground at said outlet. Something you can check with a multimeter, and easy to rewire.
    Truck setup
    Alpine 9856
    Phoenix Gold RSD65CS

    For Sale
    Polk SR6500
    Polk SR5250
    Polk SR104


    heiney9 wrote: »
    Any clue how to use the internet? Found it in about 10 sec.
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  • mmadden28
    mmadden28 Posts: 4,283
    edited July 2009
    Run the TV to a remote outlet with an extension cord. Just something to try.
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  • kawizx9r
    kawizx9r Posts: 5,150
    edited July 2009
    Btw, if you own a power conditioner and are NOT using the coaxial ins/outs from the wall to your conditioner and then out to your satellite/cable box then youre missing out. Noticeable difference in sound and slightly better picture. There was a faint 'hiss' on several non-hd channels and theyre ALL gone since I decided to hook it up just half an hour ago. Just thought I'd share :D
    Truck setup
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    Phoenix Gold RSD65CS

    For Sale
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    heiney9 wrote: »
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  • apphd
    apphd Posts: 1,514
    edited July 2009
    What model Samsung, have you done a search to see if this is common with that model?

    For example:http://www.avsforum.com/avs-vb/showthread.php?t=791737&highlight=samsung+buzz

    Is the buzzing coming from the TV or is the TV creating a buzzing in your audio gear?
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