yousef213
Registered User
Join date: Dec 2011
313 IQ
#1
I bought a marshall class 5 and it has a subtle hum even when the volume is at 0, and it gets louder as i increase input volume. I have been suggested to rotate the OT 90 degress, do I need to frain caps and remove tubes before doing this, thanks.
AcousticMirror
loves cheesecake
Join date: Dec 2009
4,843 IQ
#2
all single ended amps hum like that.
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mmolteratx
UG God
Join date: Sep 2008
3,786 IQ
#4
Yes, you need to discharge caps and take out tubes. If you didn't even know that, maybe the mod is above your level.
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yousef213
Registered User
Join date: Dec 2011
313 IQ
#5
^Thanks The reason I asked because there are no caps on the chassis of the amp itself, so I wasnt sure ( also I am talking about rotating not replacing
Last edited by yousef213 at Jan 18, 2013,
mmolteratx
UG God
Join date: Sep 2008
3,786 IQ
#6
Well, you'd still need to place your hand inside of the chassis to insert a second nut, as well as drill a hole into the chassis. Anytime anything goes inside of the chassis, caps should be discharged. Tubes should be removed just as a general rule; it's too easy to break them when working on an amp with them in place, particularly if they're taller than the transformers and you'll be drilling the chassis.
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AcousticMirror
loves cheesecake
Join date: Dec 2009
4,843 IQ
#7
you can't just turn the ot. it's not on a swivel. you need to unscrew it and drill new mounting holes for it.
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Perverockstar69
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Join date: Jul 2011
3,494 IQ
#9
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