grainy pick attack MK IV

Pre Recto days. Boogie modified Fenders, Mark I-IV, Dual Calibers, etc

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Civgeek
Bottle Rocket
Posts: 15
Joined: Mon Dec 13, 2010 11:43 am

grainy pick attack MK IV

Post by Civgeek » Thu Jan 24, 2019 11:59 pm

OK weird one.

I have noticed recently that my MIV is really grainy at pick attack so the notes get all mushed together. It's almost like a secondary saturation.
I've tried a bunch of different settings and changed Power tubes. No luck.
I'm a guitar guy and not an amp guy so looking for a bit of help here.
Would this be something that could come from a preamp tube? All the preamp tubes were replaced about 3 years ago and the amp was serviced and recapped about 4 years ago.

Thanks!!

Oh and yesterday while trying to diagnose I was playing big chords and the volume was phasing in and out. Only did it for a couple min. But thought I should mention.
'06 S470 DXQM (stolen 2/08 recovered 8/09)
'04 S470 DXQM
'90 GMP Custom prototype
'88 RG 560
'84 Strat
Mesa Mark IV
Digitech 2120
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lions
Mark II
Posts: 75
Joined: Thu Feb 22, 2018 11:37 pm

Re: grainy pick attack MK IV

Post by lions » Fri Jan 25, 2019 8:16 am

Try changing out preamp tubes?

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