TC 50 Combo Noise

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cuuhl
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Location: Lotta Rock Arkansas

TC 50 Combo Noise

Post by cuuhl » Fri Feb 01, 2019 7:17 pm

Hey all, I’m hoping somebody has a similar experience with this so I don’t have to completely disassemble my TC 50 combo amp… The amp makes a noise like tube rattle when I’m playing lower octave notes. It’s a relatively loud noise as I’m playing at about 90 dB and can hear it. At first I thought it was coming through the speaker, but Its not. I removed each pre-amp tube cover one at a time and it did not make a difference. It seems like it’s coming from within the chassis. Does anybody have any idea what might be making this noise and/or suggestions for a fix? Thanks!
cuuhl

Mark V:25
Carvin 2x12 - V30s
Gibson ‘59 Les Paul RI

ggmalcolm
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Re: TC 50 Combo Noise

Post by ggmalcolm » Fri Feb 22, 2019 12:23 pm

I also had one that made rattling noises, and I tracked it down to being the speaker causing it.
My test method was to capo a low offending note, striking it and while letting it ring out press firmly on the back of the speaker in towards the cabinet.

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Re: TC 50 Combo Noise

Post by Authorized Boogie » Fri Feb 22, 2019 12:48 pm

cuuhl wrote:
Fri Feb 01, 2019 7:17 pm
Hey all, I’m hoping somebody has a similar experience with this so I don’t have to completely disassemble my TC 50 combo amp… The amp makes a noise like tube rattle when I’m playing lower octave notes. It’s a relatively loud noise as I’m playing at about 90 dB and can hear it. At first I thought it was coming through the speaker, but Its not. I removed each pre-amp tube cover one at a time and it did not make a difference. It seems like it’s coming from within the chassis. Does anybody have any idea what might be making this noise and/or suggestions for a fix? Thanks!
Sounds like it could be a power tube rattling. While you play, have someone hold each power tube one at a time with a towel (as the tubes will be hot) and see if it stops when a particular tube is held. Not uncommon in a combo amp.
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cuuhl
Bottle Rocket
Posts: 19
Joined: Thu Jul 20, 2006 4:33 pm
Location: Lotta Rock Arkansas

Re: TC 50 Combo Noise

Post by cuuhl » Fri Feb 22, 2019 1:08 pm

I hadn’t thought about the power tubes. I’ll give it a whirl. Thanks!
cuuhl

Mark V:25
Carvin 2x12 - V30s
Gibson ‘59 Les Paul RI

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