#1
My friend and I have matching peavey 5150s. He plays with his gain on 8 and i play with mine on 5. Well let me first state the problem: my amp feedsback so bad that it overides the note i hit and sometimes even just completely cuts it off. It feedsback when my volume on my guitar is completely off. We switched guitars to see if it would do the same thing and it does. i know i know lower the gain and it wont do it. well if we have the same amps theres no reason i cant play with my gain on 8 like him and not have that problem. And even the it still does it after i lower my gain. i am trying to narrow down the possibilities of what the problem is. As far as i know its NOT my guitar. Maybe i need new tubes. but i dont know how to tell if i need some. so please help me out here. Oh yeah its not like regular feedback, its like earsplitting, screaming feedback, kinda like if you were to do a unison bend on the 35 fret (if there was one) and you just hit it over and over. and it does it consistantly with my volume OFF. thanks


I googled it, and search barred the question also..... no answeres.
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Quote by Ex'sAndOh's
Porn is everywhere. Look around.
Porn is in the forest, in your parents bedroom, in the sea.
But most importantly, in your heart.

Gear:
Galveston Doubleneck
Peavey 5150
Slash Wah
Last edited by zep_n_gun at Nov 5, 2007,
#2
I'm not exactly an expert, but I'll offer what limited advice I can: I'm guessing it's the tubes. Some might have gone, whatsitcalled, microphonic? Something like that. And you can just take the amp to a guitar shop, they'll probably change the tubes for you.
#3
well swap tubes and see if it does the same thing. As you said, it could be the tubes.


EDIT: and you dont need to take it to a shop to change the tubes out. Its just a matter of pulling the old ones out, and putting the new ones in. Takes less than a minute
#4
May be microphonic pickups or a valve problem. What're your channel and master volumes set at?

wait, does the 5150 even have a master?
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#5
If your friend is up for it, maybe you could swap tubes with him and see if that is the problem. Do just the power tubes, test it out, then do the rest.
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#7
have you tried moving your stuff around? does it do that when you're playing by yourself? if not, you could just have the acoustics set up terribly so your amp is feeding back off of his audio signal. that happened to me a while back...couldn't figure out what was wrong til i figured to angle my amp differently in conjunction to the other guitarist and his amp, bassist and his amp, the mics and our pa system.
#8
Noise gate?
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#9
Well we did move our stuff around the room. i googled "microphinic" and it sound like the problem. The feedback is more of a howl. and mean howl....


Can you tell if your tubes are bad by looking at them?
Quote by Beowulf 2112
I hope Karma puts you in a microwave
Quote by Ex'sAndOh's
Porn is everywhere. Look around.
Porn is in the forest, in your parents bedroom, in the sea.
But most importantly, in your heart.

Gear:
Galveston Doubleneck
Peavey 5150
Slash Wah
#10
when we play, none of the speakers are facing each other. they are facgin the drummer.

like this:

.|_| <---P.A. Drummer ---> |_|
|_| <--- Friend 5150
.|_| <--- Bass Amp
|_| <--- My 5150
Quote by Beowulf 2112
I hope Karma puts you in a microwave
Quote by Ex'sAndOh's
Porn is everywhere. Look around.
Porn is in the forest, in your parents bedroom, in the sea.
But most importantly, in your heart.

Gear:
Galveston Doubleneck
Peavey 5150
Slash Wah
#11
try playing your amp with everything else off. the pa, all of the other amps. if it's fine, then it's probably the way your **** is set up. for the microphonic acoustics whatever thing, try facing your amps in entirely different directions. perhaps on different levels, too. angle yours upward and to a different corner of the room and see how that works. otherwise...check the tubes, check your leads. i've never had any problems with my tubes going all funny...they've either been fine or been dead. so i can't really comment on that, but maybe look into that some more, as well.
#12
Quote by aznrockerdude
Noise gate?


QFT.

A boss ns-2 on the right settings should sort it out, if not you probably need better pickups; more specifically ones that have been shielded against microphony (BKPs for instance).
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#14
Ah the downside of tube amps. Tubes can be funny things. There are good ones and crappy ones. Some companies make better ones than others. You didnt say how long the tubes have been in there? They also dont like to be banged around. Especially after its been run a while and the tubes are still hot.