peavey classic 30 problem?

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andydeedpoll

i do love smilies...
hi,

i got a Peavey Classic 30 about 4 months ago - babied it, and it's worked fine up till now. an hour and a half into band practise at a very moderate volume, i started to get a wierd crackly noise coming whenever i played. switched it off to see if it was any better when it had cooled a bit, and started practising a song where i played keyboard. tonight - switched it on, let it warm up as per usual and then tried again - exact same problem.

i've still got my guarantee and everything, so that's not a problem - i'm ringing them tomorrow and hopefully going to get it changed by thursday. screws me up for band practise on tuesday and a big gig on saturday night though :mad:.

any idea what this could be? it's like a crackle whenever i play a note/chord or anything. as far as i'm aware, i've done everything i should have done to use it properly. i'd rather keep this amp if it's repairable, to be honest...

any thoughts?

thanks!

Andrew.
 
Try a different speaker and see if that is the problem. At least it would eliminate having to tear into the amp head itself if it is the speaker.
 
Anfontan said:
Try a different speaker and see if that is the problem. At least it would eliminate having to tear into the amp head itself if it is the speaker.
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it's a combo amp? and i don't have a different speaker to try it out with i'm afraid :(

could this be a problem with the tubes? it happens on both channels, so i assume, if it was tubes, it'd point at one of the power ones? i don't really have a clue, and would much prefer this to be someone elses problem :o :p

Andrew.
 
andydeedpoll said:
it's a combo amp? and i don't have a different speaker to try it out with i'm afraid :(

could this be a problem with the tubes? it happens on both channels, so i assume, if it was tubes, it'd point at one of the power ones? i don't really have a clue, and would much prefer this to be someone elses problem :o :p

Andrew.
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A crackling sound can be the sign of a speaker cone that is loose-after all speakers are glued together and the glue can let loose. I was simply saying to look for the easy thing first-I encounter stuff like bad speakers at work a lot.
It also could be a tube though, tubes create a lot of heat when they do what they do to amplify. Take it to the shop and make them repair it properly..
 
Have you tried another cable or checked the solder connections in the guitar itself?
 
Guitarer said:
Have you tried another cable or checked the solder connections in the guitar itself?
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yeah, of course. different guitars/leads and channels (did i say that already?) gave the exact same effect. thanks though!

loose speaker? i assume that's a manufacturers thing to repair, and not me?

ta!

Andrew
 
I have a classic 30 and I had a similar problem with a loose tube one time. Re-seat the tubes while the amp is off/cool and see if that makes any difference.

Have you moved the amp recently before it had a chance to cool all the way down? Could be a bad tube.
 
Kramer said:
I have a classic 30 and I had a similar problem with a loose tube one time. Re-seat the tubes while the amp is off/cool and see if that makes any difference.

Have you moved the amp recently before it had a chance to cool all the way down? Could be a bad tube.
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i'm not that quick with this type of stuff - reseat it? you mean just make sure they're properly connected into the socket for them? do i have to take the tube guard off for that?

and no, it's sat in my room for about two weeks, didn't play it the day i went to practise and it just randomly started doing it.

Andrew.
 
andydeedpoll said:
i'm not that quick with this type of stuff - reseat it? you mean just make sure they're properly connected into the socket for them? do i have to take the tube guard off for that?

and no, it's sat in my room for about two weeks, didn't play it the day i went to practise and it just randomly started doing it.

Andrew.
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yes, take the guard off ( Mine doesn't have one) and make sure the tubes are connected tightly into the socket. Take a look at them and make sure they are all burning brightly too.
 
Kramer said:
yes, take the guard off ( Mine doesn't have one) and make sure the tubes are connected tightly into the socket. Take a look at them and make sure they are all burning brightly too.
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i didn't take the guard off, but i can get my hand round the back of it, and they were all as tight as each other, and they're all burning as they always have done. on the phone, the people at the shop have said that they'll send it off for repair which will take at least 28 days... :mad: my bands last gig on saturday (we're fairly sure it's going to be a packed venue - maybe up to 250 people), last practise tomorrow and i leave for university in about 14 days... hopefully they'll be able to do something to repair it as soon as they see it... i'm taking it in tomorrow. no one i can really borrow off either - i use all the effects loop and everything, and i'd hate to have to use anything other than a Peavey Classic 30 :(.

cheers for the help,

Andrew.
 
it could really be a lot of different things so there wasn't anyway anyone was gonna be able to diagnose it over the board.
Could be a bad speaker in a couple of different ways.
Could be a bad tube .....
Could be fractured solder joints .....
Could be a tube that's not making good contact in the socket .... just being tight wouldn't neccessarily mean it's making good contact .... I think Kramer was suggesting you pull the tube and then put it back in .... that'll clean the contacts a bit ....
I've seen all of these things make the same sound you're describing so you're gonna be better off with an experienced tech fixing it.

Sorry about your gig though ..... hope you find one to borrow.
 
arcaxis said:
On an remote chance...
If you have some spray contact cleaner, give the insides of the send and return jacks of the effects loop a small squirt and put a plug into each several times. One of the jacks has an internal switch which allows the signal to pass through when nothing is plugged in and blocks the signal if a plug is inserted. If it gets a bit of crud on it, it possibly could get a crackle in the sound. I've got a Tech21 Trademark 60 that gets intermittent like this every once in while.

Another check you can try for the same problem is just take a regular guitar cord and plug the two ends into the send and return of the effects loop jacks.

Another idea...
Run your guitar into an effects pedal and out directly into the return of the effects loop. If it sounds OK the problem may be in the preamp part of the amp. If it still crackles, likely the power amp side.

It sounds sort of like the problem might be heat related as the amp warms up. Could be a bum solder joint, in which case putting in the shop for a warranty fix is what you gotta do unfortunately.
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even more things it could be .... :D
That's some good suggestions .... things you might can fix yourself.
If I had to bet I'd go with bad solder joints but really, it could be any of these things and probably a dozen others no one has thought of yet.
 
i didn't think of trying the send/return like that, thanks! i'll try it, though thinking about it, it started to happen while i was running pedals in the loop at practise, so maybe that says it all? i'll have a go though :)

while it appears to be heat related to me too, it happens as soon as i've left the amp to warm up for ten minutes now... maybe something heat related caused it to happen in the first place though? :confused:

ta,

Andrew.

edit - no, using the return jack still causes the noise, as does using the normal input with a lead between the send and the return.
 
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Sorry, but I think it's foolish to mess with ANY of that stuff if you have only had it 4 months and it is still under warranty.

If that happened here with me, the store I buy Peavey gear from would have replaced it by now with a new one.......

Dont even mess with it, make them live up to the warranty, replace that thing asap.....
 
andydeedpoll said:
on the phone, the people at the shop have said that they'll send it off for repair which will take at least 28 days... :mad: .
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man, you've only had it 4 months and they're going to take 28 days to repair it? That's unacceptable.
 
usually pedals don't go in the efx loop. the go in front of the amp. line level stuff goes in the efx loop. this could be it. just trying to help.
 
I have a Classic 30. I had a problem once with one of the tube guards being too loose, and I could here it pinging against the tube. Not really a "crackling" sound though, but people describe things differently.
 
FALKEN said:
usually pedals don't go in the efx loop. the go in front of the amp. line level stuff goes in the efx loop. this could be it. just trying to help.
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that's news to me! the most i've heard is "gain pedals like overdrive/distortions before preamp, modulation in loop if you feel like it" .

:confused:

Andrew.
 
Kramer said:
man, you've only had it 4 months and they're going to take 28 days to repair it? That's unacceptable.
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yeah :( i'm really hoping they'll lend me something till it's fixed. they'll just send it straight back to Peavey i assume. i know it's unlikely i'll get one on loan, but i'm not going to take no for an answer straight away :p

and no, i haven't messed around with it very much - i haven't removed any screws... in fact, i haven't done anything other than look at it and play into the return jack of the loop! nothing they can take me up on at All... i'm very careful with stuff like that, because i know they wouldn't think twice about telling me they can't fix it because of something like that.

Andrew.
 
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