My Amp Is Making Crackling Noises And Drops In Volume, What could it be?! |
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May 31 2011, 04:38 PM
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The last months my amp has been acting pretty weird. If playing heavy, or just loud enough on clean for about 40-60 minutes, it start making crackling noises and has sudden volume drops. At first I thought a tube had gone, but a amp technician has changed the tubes twice, and when I came back the third time, he gave up! He didn`t manage to get the bad noises him self, therefore not being able to repair anything.
So I now present to you, the terrible sounds it makes. And I exaggerated a bit, for example by using the octave pedal on the low B, just to provoke the amp to make the noise clearly. Sorry for clipping by the way, to high mic volume  
PeaveyCrackle.mp3 ( 1.11MB )
Number of downloads: 3690Does anyone have a idea what it could be? -------------------- Take your music seriously, but not yourself
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May 31 2011, 05:20 PM
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If your amp tech cannot repair it, I suggest you find some other tech that can! Try asking around for people who fix these amps, it could be that some electronics went bad. I hope it's nothing serious man.
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May 31 2011, 05:36 PM
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If he was not able to replicate the noises, could it be your house's electricity that is uneven?
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May 31 2011, 07:03 PM
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I'd still say it's the power amp tubes. I had the exact same amp and the exact same noise (just a little less) when one of my tubes went bad.
Especially with EL84 tubes with bendable pins/legs it's important to add electric spray. Then jack the tube in and out a few times so the jacket becomes perfectly clean. Try that as a last resort, since you got the tubes switched they should be alright. Surely there can be other less common reasons but that's what you have amp techicians for... -------------------- My bands homepage
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May 31 2011, 10:26 PM
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I wouldn't want to judge your amp tech, but are you sure he did a good job with replacing and biasing the power tubes?
-------------------- - Ivan's Video Chat Lesson Notes HERE
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Jun 1 2011, 02:03 AM
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i agree with th others either tubes , biasing or pins
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Jun 1 2011, 07:07 AM
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Ever wonder why tube amps, have combos and head only options?
If it's a tube amp, they all do that when the tube is about to go (crackling or volume change). The harder you drive it, the quicker. If you don't replace it soon as it starts, it might explode damaging other components, I kidd you not! If the other components are damaged, it's sometimes cheaper to throw it away and buy a new one. That's the only reason I've been holding off getting one and avoid second hand. This post has been edited by Azzaboi: Jun 1 2011, 07:10 AM --------------------  Play Games Arcade Take a break, Play Games! Play the best free online flash games at Aaron's Game Zone like Bloons Tower Defense 4! |
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Jun 1 2011, 08:59 PM
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I understand the problem mate, there are few amp techs in general, and you never know who to trust. It could be that the guy did a proper work after all, just want to include that option too you know..
I'm not an amp tech myself, so not sure, it could be anything. But those particular symptoms usually mean that power tubes are running out/bad biased. -------------------- - Ivan's Video Chat Lesson Notes HERE
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Jun 2 2011, 10:31 PM
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Sometimes even the most complicated failure may be simple - the dust in the potentiometer, for example ..
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Jun 4 2011, 10:26 PM
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QUOTE (Sinisa Cekic @ Jun 2 2011, 11:31 PM)  Sometimes even the most complicated failure may be simple - the dust in the potentiometer, for example .. Hey I just remembered I had very similar crackling problem with my Marshall. It turns out there was dust on the master volume pot. I had it replaced very cheaply with an original Marshall metal pot, and it worked great! 
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- Check out my GMC Profile and Lessons - (Please subscribe to my) YouTube Official Channel - Let's be connected through ! Facebook! :) |
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