Phatt - i have played 4 guitars ( 2 stock new ) through it . I doubt its a pickup . Also i have a peavey vyper combo and small fender combo - no microphonic feedback from guitars in that amp. And as far as potting , that specific pickup - Jackson j-50b had problems years ago 1994 to be exact . Went bad on stage . I potted it the next day . It had been in and out of multiple guitars , played through loud amps etc , bounced around in a box and was fine . My stupid move was exchanging back plates just because i didnt want to get longer screws to mount it . I think when i soldiered the ground from the plate , or took the screws out it loosened a coil again. But after potting that feedback went away . I can tell pickup microphonics from other feed back . Very screechy and you can stop it temporarily by tapping the pickup or pushing down on it . And it wouldnt explain why the amp feeds back with the cord unplugged from the guitar . Oh and when i pot , i do it right . I put a can inside a pan of water on jar lids as not to get the pickup too hot and warp it , bring water to boil ,i hold the pup in the wax with pliers moving it around until i see no bubbles come out , take it out put it in a small glass with wax , let the wax cool a little bit so it coagulates in the pup .Let it dry, Scrape wax off top with emery cloth. Wire back up.
Anyway , didnt call the amp guy yet . Ill call tomorrow .
Im convinced that the high microphonic squeal did something inside . The amp was fine - amazingly fine for a solid state not feeding back when gain is dimed . Then after the pup squeal - problems.
So ill just leave the problem at that and have the tech fix it .
Any ideas why the amp is a bit muddy sounding ? Related to main problem ? Cheap marshall MG cab ? It sounded good in the pawn shop . The only guitars they had to test were crap . I stupidly brought my dark sounding guitar back to test it. Lots of gain and good dynamics , figured the warmness was my guitar .
So im curious if say the tone of the amp is normal , can the amp be modified for a reasonable price ? I know tube amp modding can be spendy because of transformers , tube sockets, point to point wiring etc but with these things parts seem cheap . The output diodes are like $2 !
And the reason im going through all of this is ive been slumming with gear for a while . It seems pointless to fix this , sell it and get something else with maybe another problem or that i wont be happy with in the long run . Ive done that too much in my life. If he can fix and tweak it to my liking ill stick with it. If i had the dough id have a Granger m 100 or a Engl invader 150 but until i win the lotto , ill slum it with this gear .
Anyway , didnt call the amp guy yet . Ill call tomorrow .
Im convinced that the high microphonic squeal did something inside . The amp was fine - amazingly fine for a solid state not feeding back when gain is dimed . Then after the pup squeal - problems.
So ill just leave the problem at that and have the tech fix it .
Any ideas why the amp is a bit muddy sounding ? Related to main problem ? Cheap marshall MG cab ? It sounded good in the pawn shop . The only guitars they had to test were crap . I stupidly brought my dark sounding guitar back to test it. Lots of gain and good dynamics , figured the warmness was my guitar .
So im curious if say the tone of the amp is normal , can the amp be modified for a reasonable price ? I know tube amp modding can be spendy because of transformers , tube sockets, point to point wiring etc but with these things parts seem cheap . The output diodes are like $2 !
And the reason im going through all of this is ive been slumming with gear for a while . It seems pointless to fix this , sell it and get something else with maybe another problem or that i wont be happy with in the long run . Ive done that too much in my life. If he can fix and tweak it to my liking ill stick with it. If i had the dough id have a Granger m 100 or a Engl invader 150 but until i win the lotto , ill slum it with this gear .