Crackling noise - new classic 50

Drudeboy · 01-02-2009, 07:12 AM

I got a brand new classic 50 212 that is making a crackling noise, not loud but always there. It is present even when all the volumes are completely down, and does not get louder when they are turned up, just stays at a constant background level.

I took a look at the tubes and tapped them but this does make a noise or effect the crackle.

One thing I thought was odd, the preamp section has 1 electroharmonics 12ax7 and 2 JJ ecc83 tubes. Should they not all be one type especially in a brand new amp?

slowhand0461 · 01-02-2009, 07:54 AM

Does your C50 have a switch on the back for grounding? It's a little black rocker switch with a + and a - on it..try flipping that...if that doesn't work it could be a bad tube....

All the preamp tubes don't have to be the same(I have a Sovtek,tungsol and JJ83 in my 30 and I have a JJ83,tungsol and JJ83 in my 2 50's)

the power tubes have to be from a matched set though...

If you have a srare pre amp tube ,try swapping it out one by one to see if the popping stops..You can also try plugging the amp in another outlet if the first 2 suggestions don't work.

Standard 64 · 01-02-2009, 08:27 AM

If you dont seat the tube into the socket right you will get crackling,all the tubes pins need good contact.Try lightly,lightly rolling the bottom of the tubes where the pins are to push them in a little so when you seat the tube the pins open up.Dirty sockets where the tubes go in is also sometimes a problem.Check your guitar chords for tight connections into everything.

Gibsonblues · 01-02-2009, 09:11 AM

Drudeboy, I've got the same amp. It sounds like you could have a bad tube with the crackling noise. Take the back off so you have access to the tube area. With the amp on and volume up a little, take a pencil and with the eraser end, gently tap each of the tubes and listen for any crackling. You can gently put enough pressure on the tube to move it some. Tapping the tube lightly with the eraser should give you a gentle thump sound on a good tube. Sometimes if it is a bad tube you will get the crackling noise while moving or gently tapping the tube. If you have a bad tube, this may help you find the culprit. You can use different preamp tubes but always matched pairs for your 4 power tubes. Good luck and the 50's are good sounding amps!

Gibsonblues...

Drudeboy · 01-02-2009, 10:51 AM

Ok cheers guys. I took the preamp valves out and reseated them in the sockets and it seems to have cured it. There was no noise or crackling when tapping them.

@slowhand- the uk model does not have a mains polarity switch, just 220/240v selector

Standard 64 · 01-02-2009, 11:25 AM

Quote:

Originally Posted by Standard 64

If you dont seat the tube into the socket right you will get crackling,all the tubes pins need good contact.Try lightly,lightly rolling the bottom of the tubes where the pins are to push them in a little so when you seat the tube the pins open up.Dirty sockets where the tubes go in is also sometimes a problem.Check your guitar chords for tight connections into everything.

Volusia · 01-02-2009, 04:47 PM

Glad you were able to fix it. The Peavey Classics are great sounding amps. Let us know how you like yours.

diceman · 01-03-2009, 12:02 AM

Glad you got it worked out! My C50 is about to see its first gig (while owned by me, anyways) on Thursday. I'm sure it'll do well!

Standard 64 · 01-03-2009, 08:59 AM

Quote:

Originally Posted by Drudeboy

Ok cheers guys. I took the preamp valves out and reseated them in the sockets and it seems to have cured it. There was no noise or crackling when tapping them.

@slowhand- the uk model does not have a mains polarity switch, just 220/240v selector

Is your amp still o.k?

01-02-2009, 07:12 AM	#1 (permalink)
Drudeboy V.I.P. Member Join Date: Nov 2008 Location: Yorkshire Posts: 7,135 Thanks: 78 Thanked 515 Times in 146 Posts	Crackling noise - new classic 50 I got a brand new classic 50 212 that is making a crackling noise, not loud but always there. It is present even when all the volumes are completely down, and does not get louder when they are turned up, just stays at a constant background level. I took a look at the tubes and tapped them but this does make a noise or effect the crackle. One thing I thought was odd, the preamp section has 1 electroharmonics 12ax7 and 2 JJ ecc83 tubes. Should they not all be one type especially in a brand new amp?

01-02-2009, 07:54 AM	#2 (permalink)
slowhand0461 Tone Hunter Join Date: Jul 2008 Location: Wendell,NC USA Posts: 1,596 Thanks: 84 Thanked 12 Times in 9 Posts	Re: Crackling noise - new classic 50 Does your C50 have a switch on the back for grounding? It's a little black rocker switch with a + and a - on it..try flipping that...if that doesn't work it could be a bad tube.... All the preamp tubes don't have to be the same(I have a Sovtek,tungsol and JJ83 in my 30 and I have a JJ83,tungsol and JJ83 in my 2 50's) the power tubes have to be from a matched set though... If you have a srare pre amp tube ,try swapping it out one by one to see if the popping stops..You can also try plugging the amp in another outlet if the first 2 suggestions don't work. __________________ "Crank up the Drums...Crank up the Bass....Crank up My Les Paul in your Face"

01-02-2009, 08:27 AM	#3 (permalink)
Standard 64 Senior Member Join Date: Jul 2008 Location: Milky Way Galaxy Posts: 2,071 Thanks: 18 Thanked 20 Times in 8 Posts	Re: Crackling noise - new classic 50 If you dont seat the tube into the socket right you will get crackling,all the tubes pins need good contact.Try lightly,lightly rolling the bottom of the tubes where the pins are to push them in a little so when you seat the tube the pins open up.Dirty sockets where the tubes go in is also sometimes a problem.Check your guitar chords for tight connections into everything. __________________ 2005 Gibson Les Paul Standard HCS 2011 Fender American Standard Stratocaster. 2012 Fender Jaguar with Lollar P90 pickups. 1965 Fender Tremolux amplifier(AB763) 2012 Orange Holy Terror(Mercury Magnetics).

01-02-2009, 09:11 AM	#4 (permalink)
Gibsonblues Senior Member Join Date: Oct 2007 Location: Austin, Texas Posts: 818 Thanks: 1 Thanked 0 Times in 0 Posts	Re: Crackling noise - new classic 50 Drudeboy, I've got the same amp. It sounds like you could have a bad tube with the crackling noise. Take the back off so you have access to the tube area. With the amp on and volume up a little, take a pencil and with the eraser end, gently tap each of the tubes and listen for any crackling. You can gently put enough pressure on the tube to move it some. Tapping the tube lightly with the eraser should give you a gentle thump sound on a good tube. Sometimes if it is a bad tube you will get the crackling noise while moving or gently tapping the tube. If you have a bad tube, this may help you find the culprit. You can use different preamp tubes but always matched pairs for your 4 power tubes. Good luck and the 50's are good sounding amps! Gibsonblues... __________________ Play them blues boy.... Amps used: Swart, Fender, Gibson Guitars used: Gibson, Fender, G&L, Gallagher, Alvarez Yaire Pedals: Fulltone, Vintage Boss, Lovepedal, Way Huge, MXR, Electro Harmonix, Hardwire, CMATMODS, Vintage Ibanez, ModTone, Nobels Recording: ZoomR24, PC/Reaper, Shure, AKG, Audio Technica, M-Audio

01-02-2009, 10:51 AM	#5 (permalink)
Drudeboy V.I.P. Member Join Date: Nov 2008 Location: Yorkshire Posts: 7,135 Thanks: 78 Thanked 515 Times in 146 Posts	Re: Crackling noise - new classic 50 Ok cheers guys. I took the preamp valves out and reseated them in the sockets and it seems to have cured it. There was no noise or crackling when tapping them. @slowhand- the uk model does not have a mains polarity switch, just 220/240v selector

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01-02-2009, 04:47 PM	#7 (permalink)
Volusia Senior Member Join Date: Aug 2007 Location: Dayton, Ohio Posts: 1,551 Thanks: 71 Thanked 24 Times in 11 Posts	Re: Crackling noise - new classic 50 Glad you were able to fix it. The Peavey Classics are great sounding amps. Let us know how you like yours. __________________ *Hang out with us in the Lil' Ditty Guitar Lounge...* www.facebook.com/LilDittyGuitarLounge http://www.soundclick.com/blucas

01-03-2009, 12:02 AM	#8 (permalink)
diceman V.I.P. Member Join Date: Jul 2007 Location: Montana Posts: 29,930 Thanks: 1,212 Thanked 419 Times in 83 Posts	Re: Crackling noise - new classic 50 Glad you got it worked out! My C50 is about to see its first gig (while owned by me, anyways) on Thursday. I'm sure it'll do well!

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