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House Wiring Problems

Discussion in 'Shock Brother's DIY Amps' started by ArcticWhite, Sep 20, 2020.

  1. Cpb2020

    Cpb2020 TDPRI Member Silver Supporter

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    One thing you can try is to turn off all the breakers, but for the one that your amp is plugged into (assuming your other electronics, e.g. modems, are not all on the same line). If there is no noise then turn the other circuits on one by one to see what circuit may have an offending frequency.
     
  2. String Tree

    String Tree Doctor of Teleocity Ad Free Member

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    I owe you an Apology for not seeing ALL MY AMPS in your first Post.
    I mistakenly, somehow, was under the impression it was only that amp.

    It sounds like Capacitors discharging somewhere.
    The fact that it makes that noise with everything else turned off is pretty weird.

    It could be something being fed to you from the Power Grid.
    It is no Secret that the Pacific Nowthwest Grid has been under a LOT of strain as of late.

    As a sign of total desperation, is there any chance you could plug it in at somebody else's house?
     
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  3. EmWeAh

    EmWeAh Tele-Meister

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    Are powerline adapters present? Any chance you might get your hands on a power strip with built-in rfi filter?
     
  4. ArcticWhite

    ArcticWhite Tele-Afflicted

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    No powerline adapters.
    I've turned off every surge protector and computer in the house.
    I haven't yet turned off all the breakers except for one. Will try that tomorrow if possible
     
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  5. King Fan

    King Fan Poster Extraordinaire

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    I assume you also unplugged your new modem for this. We should all probably do that once a day; sometimes I think I should do it for 23.75 hrs a day. :)

    This is the weakest possible hunch, but the noise vaguely suggests a fan, which makes me wonder about electric motors / compressors / etc: Fans, AC, fridge, I dunno.
     
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  6. sds1

    sds1 Tele-Afflicted

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    There is definitely a time-based component (non-random) to the noise that cannot easily be ignored...
     
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  7. awasson

    awasson Poster Extraordinaire Gold Supporter

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    Where’s your cell phone and is the modem and router off. Laptops, desktops, electronic ground fault breakers? Did they upgrade your meter to a digital one?

    My amp picked up my cell phone and if it weren’t for the repeating cycle, I wouldn’t have known what it was. It sounded similar but had a high pitch component to it too.
     
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  8. SacDAve

    SacDAve Poster Extraordinaire Silver Supporter

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    I would take some Amps to a friends house and try them (maybe a couple friends houses) that would rule out the Amps. Also if you go into the main panel make sure all the all the ground & breaker connections are tight if you feel safe doing that.
     
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  9. ArcticWhite

    ArcticWhite Tele-Afflicted

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    My meter is difital
    Okay, so today I flipped off every breaker in the panel except for the dedicated garage circuit and plugged in there. Cellphone in the basement.

    Same annoying chattering sound is present.
    Tomorrow I will tighten the grounds inside the panel.
     
  10. Cpb2020

    Cpb2020 TDPRI Member Silver Supporter

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    Ok, so it may be a house grounding issue, coming through the power line itself, or outside the house (e.g., a power line transformer). You’ve gone beyond my abilities.
     
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  11. Peegoo

    Peegoo Poster Extraordinaire

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    Sounds to me it may be noise in the AC supply created by a switching power supply (MOSFETs) somewhere in the house.

    To see if it's the amp, your environment, or your AC power, take your amp next door and ask the neighbor if you can plug it in to do a test. That will help rule out several things as a possible cause.
     
  12. john_cribbin

    john_cribbin Tele-Afflicted

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  13. ArcticWhite

    ArcticWhite Tele-Afflicted

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    Peegoo, the house was built in 1952.
    I switched all breakers off, except for the dedicated garage circuit.
    What sort of MOSFET would we be talking about?
     
  14. Peegoo

    Peegoo Poster Extraordinaire

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    Usually something controlling a motor.

    But if you had all the breakers off, then it's not that.
     
  15. sds1

    sds1 Tele-Afflicted

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    Any switching power supplies, he's talking about devices on the house circuit not the circuit wiring itself.

    Devices at a neighbors house can do this too. Like grow lights for example... Tesla battery chargers...
     
  16. Cpb2020

    Cpb2020 TDPRI Member Silver Supporter

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    One other thought. Do you have access to an inverter that can run off a car battery handy? (I do as I run amps off a 12v battery when necessary). Or a car with a 120v outlet? (One of my cars does).

    If you still hear the noise using those then it isn’t the power line itself or ground, it is “environmental” (e.g. electromagnetic waves coming from a transformer or maybe a neighbor’s property).
     
  17. awasson

    awasson Poster Extraordinaire Gold Supporter

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    I wonder if it’s the digital meter. Ours does some weird dimming action in the summer months that the old school analog one never did.
     
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  18. D'tar

    D'tar Friend of Leo's

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    https://www.tdpri.com/threads/200-hz-hum-in-my-garage.1023730/

    By now I feel you are comfortable with mains voltage and wiring. If this were me and I did not own a scope, I would wire in a NEW breaker and NEW short dedicated circuit to a properly wired three prong outlet right at the distribution panel and observe for the same issue. You seem to be riddled with old house wiring issues. That is quite a bummer and something a recording artist can not be bothered with each time you want to perform and record.
     
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  19. Telenator

    Telenator Doctor of Teleocity Vendor Member

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    Are you running a stand alone or ceiling fan in the room?

    I was at a rehearsal in a guy's house where he was running a ceiling fan and the flutter sound almost drove me crazy until I figured it out.
     
  20. ArcticWhite

    ArcticWhite Tele-Afflicted

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    Read the thread.
     
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