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  1. #1
    Emperor of VHLinks.com Brett's Avatar
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    12.14.17 @ 08:05 AM
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    Loud Buzzing on 5150

    You know I keep thinking it's the shitty wiring at our studio that keeps causing this annoying buzz on my amp when I'm not playing. But we switched rooms last night and played in the huge showcase room and it was like worse. BUZZZZZZZ!!! I had to like switch my amp to the clean channel so we could fucking talk between the songs. It was ridiculous. I am not playing through my cab, I never do, I always play through the same Marshall and I have for years there. And yes I have it set on the right OHMS.

    Any other ideas? A ground issue maybe? I guess I could set my stuff up here and test it, but it's kind of pain as I keep my cab in the closet in the garage unless we're playing out.

    Could it be something on my pedal board? I mean even with the noise gate on, it doesn't even make a dent in stopping it.

    I can post actually a sound clip if that would help you guys hear it, we actually recorded it last night.

    Gracias.
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  2. #2
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    12.09.17 @ 09:22 AM
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    Are you near fluorescent lights?.. I have that issue at our drummer's place. It's usually not as bad as you describe, though.

    I played this Battle Of The Bands once where I had this awful buzz 1st time I turned on my amp, whcih sat on the stage. Could not figure out what the hell was going on... we couldn't play it was so bad. (Umm, not good for a BOTB!) Turned out there was some heavy-duty wiring under the stage right beneath my amp. Don't remember what was under there, but I moved the amp and it was good.

    Just an idea..
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  3. #3
    Emperor of VHLinks.com Brett's Avatar
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    12.14.17 @ 08:05 AM
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    No they don't have flourescents there, and until maybe a month ago or two it was never like this. Now I have put LED's inside my 5150 to make it look cool, but I did that years ago and it was fine. And I even turned them off last night to see if that was it....nope.

    I kept thinking it was the studio but three different rooms now this has happened, and something tells me it's not the studio now. I mean we were in the humungous showcase room and it was worse than ever.
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  4. #4
    5150 LudwigVonDrumCrazy's Avatar
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    08.29.14 @ 12:33 PM
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    In all my years of playing, a BUZZ like that usually stems from a ground issue of some sort, or a bad cable along the chain
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  5. #5
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    10.26.16 @ 03:37 PM
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    Could be a lot of things, assuming grounding/power outlet issues are not causing it -- the most common:

    Bad input jack. I've seen quite a few go, especially on the combos. I've replaced 2-3 of them at least. Usually that causes a high pitched and absolutely PAINFUL screeching though, besides the buzzing. Also, you can usually wiggle the cable around or punch the amp and it should change from screeching to buzzing, or go away for a while, so that's probably not it unless you really bashed in your jack.

    Bad preamp tube(s). Get a good spare and swap it in for the existing ones, 1 by 1, until it goes away. If it doesn't go away, there's a small chance you have 2 or more bad preamp tubes, but they don't tend to fail all at once.

    Bad power tube(s). If you crank the post on the clean channel up to be as loud as your lead channel, do you have the same buzz, or does it disappear or lessen a lot when you switch? If it does go away with the switch with both channels at matched volumes, your power tubes are probably ok.

    Semi-broken relays. I doubt this is your problem, unless you've been having problems channel switching the amp -- like where it will hang 'in between' channels every now and then for a while before switching completely.

    Try a different guitar, cable, and try removing everything else from your signal chain except guitar->cable->amp->cab if you haven't already.... wouldn't want to tear into the ol' 5150 if something else is messed up.

  6. #6
    Emperor of VHLinks.com Brett's Avatar
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    12.14.17 @ 08:05 AM
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    My thought was grounding, but I don't really don't think so on that. I think I still had the buzz went I direct in, and not through my pedal board, but damn I can't remember now.
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  7. #7
    Emperor of VHLinks.com Brett's Avatar
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    12.14.17 @ 08:05 AM
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    Bad input jack. I've seen quite a few go, especially on the combos. I've replaced 2-3 of them at least. Usually that causes a high pitched and absolutely PAINFUL screeching though, besides the buzzing. Also, you can usually wiggle the cable around or punch the amp and it should change from screeching to buzzing, or go away for a while, so that's probably not it unless you really bashed in your jack.
    Nah not the jack, tried both actually, same result. No screeching or anything either.

    Bad preamp tube(s). Get a good spare and swap it in for the existing ones, 1 by 1, until it goes away. If it doesn't go away, there's a small chance you have 2 or more bad preamp tubes, but they don't tend to fail all at once.
    I'll have to get some to try this.

    Bad power tube(s). If you crank the post on the clean channel up to be as loud as your lead channel, do you have the same buzz, or does it disappear or lessen a lot when you switch? If it does go away with the switch with both channels at matched volumes, your power tubes are probably ok.
    Same buzz on the clean channel, just not nearly as loud. Maybe they came loose or a bit unseated bouncing around in my car. I didn't think to check them all.

    Semi-broken relays. I doubt this is your problem, unless you've been having problems channel switching the amp -- like where it will hang 'in between' channels every now and then for a while before switching completely.
    Nope switching works fine.

    Try a different guitar, cable, and try removing everything else from your signal chain except guitar->cable->amp->cab if you haven't already.... wouldn't want to tear into the ol' 5150 if something else is messed up.
    Done it, worse with other guitars actually. In fact darn near unusable with my Warmoth with the EVH Wolfgang pickup in it.

    I guess the best thing I can do is hook it up at home and see what happens with my cab.
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  8. #8
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    10.26.16 @ 03:37 PM
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    I'd say it's preamp tube or building power supply problems then.

  9. #9
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    12.13.17 @ 10:42 PM
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    Do you hear buzzing or crackling?

    Here's my 5150.
    I haven't used it live in 6 years and it makes crackling and microphonic sounds.



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  10. #10
    Sinner's Swing! Bullwinkle's Avatar
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    06.07.15 @ 10:30 AM
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    Brett, in a pinch, I've been able to solve bad pre-amp tube noises in my Marshall by switching the tubes around. In the Marshall, the pre tubes are all the same kind, I don't know if the 5150 is the same. It's weird, but sometimes a tube that is bad in one socket won't be bad in another socket.
    If you can do that with the 5150 and the noise goes away, then I'd get some new tubes just to be on the safe side.

    A bad buzzzzzz like that does sound like a ground, though. I hate grounding problems.

  11. #11
    Emperor of VHLinks.com Brett's Avatar
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    12.14.17 @ 08:05 AM
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    Johnny no it's buzzing not crackling. It sounds like yours, only 100x worse.

    Here guys listen to this. It's a terrible recording and we sound awful, but it's a song that you can hear it because of all the stops. Takes about :25 for the song to start, we fuck around for a bit, but you can hear it even before I come in. I mean you hear it over everything, and my amp wasn't that close to the middle of the room where the mic was either. Listen to the verses because that's my guitar, the singer doesn't play during them.
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  12. #12
    Summer Nights in Cabo SNIC's Avatar
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    10.19.17 @ 06:44 PM
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    Are there any bees in the room where you are playing?

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  13. #13
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    10.26.16 @ 03:37 PM
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    Ok... that sounds like a power supply problem in the place you're playing in.... or a massive grounding problem. Definitely could be a bad preamp tube exaggerating it though.

    Right now where I'm living I get the exact same noise all the time, just not as bad. For me it's still super annoying though, since I'm doing recording work with it, so you notice every little buzz.... I'm probably gonna end up rewiring my house....

  14. #14
    Sinner's Swing! Bullwinkle's Avatar
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    06.07.15 @ 10:30 AM
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    Quote Originally Posted by Brett View Post
    Johnny no it's buzzing not crackling. It sounds like yours, only 100x worse.

    Here guys listen to this. It's a terrible recording and we sound awful, but it's a song that you can hear it because of all the stops. Takes about :25 for the song to start, we fuck around for a bit, but you can hear it even before I come in. I mean you hear it over everything, and my amp wasn't that close to the middle of the room where the mic was either. Listen to the verses because that's my guitar, the singer doesn't play during them.

    Ugh. I get flashbacks of crawling around on the floor checking connections for hours when I hear a sound like that.
    It could be so many things, that it's pointless to guess. One bit of good news: It's usually one single thing that's causing it, and when you find it and fix it, the buzz stops immediately, and you get to enjoy that sweet, sweet silence.

  15. #15
    Emperor of VHLinks.com Brett's Avatar
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    12.14.17 @ 08:05 AM
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    We've played there for 10 years and I've never had this problem, and our singer who notoriously has feedback and fucked up noises from his amp isn't having this problem either. This leads me to believe it's my amp.
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