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Author Topic: Marshall Half-Stack Question  (Read 3988 times)
VolcomStone
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« on: July 19, 2005, 06:24:21 PM »
I have a Marshall JCM 2000 DSL head and 1960A cabinet.  For a while I've been noticing strange feedback noise whenever I crank the volume.  This usually happens when I turn the ultra lead volume up past 2 or 3.  It's a loud, steady squeal or whine and sounds different from normal feedback caused by the guitar.  I'm 99% certain something's wrong with the amp, but I was wondering if any of you have any ideas before I open it up.
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MeanBone
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« Reply #1 on: July 19, 2005, 06:40:39 PM »
may be the guitar pickups. wich guitar is it? if it's a cheap guitar or an epiphone it's problaby the pickups. bad guitar pickups will squeal like a dog in heat when the volume or gain is cranked up.
u can always get a noise gate. but if it's because of the guitar change the PU's for Dimarzio, Seymour Duncan or EMG. these 3 usually rock. my fav are Di Marzio and EMG for heavier sounds like Zakk Wylde.
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VolcomStone
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« Reply #2 on: July 19, 2005, 07:28:54 PM »
Nah, I'm certain it's not the guitar.  It's a Gibson Les Paul Studio, and even though I should replace the pickups soon I'm sure it's not that.  It's not your normal feedback you get from the guitar, it's definitely something in the amp.  It's just a loud, unchanging, high-pitched whine.
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AdZ
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« Reply #3 on: July 19, 2005, 08:04:37 PM »
Going through any pedals?
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VolcomStone
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« Reply #4 on: July 19, 2005, 10:26:38 PM »
nope
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Genesis
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« Reply #5 on: July 20, 2005, 10:41:55 AM »
Probably ur tubes need changing... They give off a whine when they are abt to go bust....
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VolcomStone
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« Reply #6 on: July 20, 2005, 11:37:39 AM »
yeah, i figured it had something to do with that.  how much does that usually cost to get them changed?
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Genesis
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« Reply #7 on: July 20, 2005, 02:05:34 PM »
SED: http://www.thetubestore.com/svetlana.html
JJ/Eurotubes: Send a mail to Bob, eurotubes@cnnw.net and he'll tell u what u need and how much it'll cost...  ok
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« Reply #8 on: July 21, 2005, 02:01:15 PM »
I had a marshall who got broken because of anormal voltage values... the volume pot started makin UGLY noise  Undecided
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Johnny Rattlesnake
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« Reply #9 on: November 21, 2005, 02:43:18 PM »
You could have a bad cable. Simple but worth checking.  Maybe the amp isn't grounded properly.  How close is the amp to other electical appliances? 
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