Steve Vai's modded 1959 JMP

[Strateuphoria]

STEVE VAI

 

[Les Moore]

What are the 2 extra small tubes for? One ought to be for the effects loop. The other?

 

[HOT TUBES 70]

What are the 2 extra small tubes for? One ought to be for the effects loop. The other?

Maybe an extra gain stage ?

 

[Jonathan Wilder]

I'm concerned at the 2 amp HT Fuse rating. Should only be 1A on 100 watters. Mains fuse should be 4 amp if it's wired for 120V operation and 2 amp if it's wired for 230/240V operation.

 

[bennieusmaximus]

Are those the original LCR caps?Ya think they would have been changed by now.

 

[Mr. Bones]

The small white printing makes me think the caps are ARS, same brand as the tubes.
Is this amp actually a 2203?
It appears to have had an original master volume and a Pre amp volume instead of a volume for each channel, and they could have added the extra two jacks at some point in time. ????

 

[charveldan]

Amp looks rough, wasn't that hacked-up by Lee Jackson?

 

[Les Moore]

Master 1 in front and a master 2 on the back. What setup is that? What do they do?

 

[plexifier]

I'm more concerned about anyone chasing Vai's tone! (not that Strateuphoria mentioned this). Vai is obviously very talented but his tone has never inspired me. Just my opinion.

 

[Les Moore]

Me neither. Still curious about all those volumes though.

 

[Strateuphoria]

Master 1 in front and a master 2 on the back. What setup is that? What do they do?

I'm thinking, the one in the front is a pre-gain (this 1959 is modded like on a 2203) and the volume on the back could be a PPIMV.

"The 100 watt Marshall JMP was given to Ted Templeman by Steve Stevens during the NYC recording sessions for “Eat Em and Smile.” The amp was then modded to Steve’s liking by Lee Jackson, famous for performing sought after custom modifications to Marshall amplifiers for top artists in the 1980′s and 1990′s. It was Steve’s main amp for the “Eat Em and Smile”sessions and used on the entire David Lee Roth tour. The 100 watt plexi head features an extra gain stage, frequency adjust control, effects loop & master volume. The head has been well maintained in Los Angeles and features matching Drake transformers, KT88 quad-matched power tubes & hand-selected pre-amp tubes to Steve’s liking.



The twin 4×12 cabinets are outfitted with Celestion Vintage 30 speakers made in Ipswich, England. Both cabinets bear Steve’s signature, certification & are in perfect working order."

the 2 extra tubes could have to do with the fx loop and freq adjust?

 

[AudioWonderland]

I'm thinking, the one in the front is a pre-gain (this 1959 is modded like on a 2203) and the volume on the back could be a PPIMV.

"The 100 watt Marshall JMP was given to Ted Templeman by Steve Stevens during the NYC recording sessions for “Eat Em and Smile.” The amp was then modded to Steve’s liking by Lee Jackson, famous for performing sought after custom modifications to Marshall amplifiers for top artists in the 1980′s and 1990′s. It was Steve’s main amp for the “Eat Em and Smile”sessions and used on the entire David Lee Roth tour. The 100 watt plexi head features an extra gain stage, frequency adjust control, effects loop & master volume. The head has been well maintained in Los Angeles and features matching Drake transformers, KT88 quad-matched power tubes & hand-selected pre-amp tubes to Steve’s liking.



The twin 4×12 cabinets are outfitted with Celestion Vintage 30 speakers made in Ipswich, England. Both cabinets bear Steve’s signature, certification & are in perfect working order."

the 2 extra tubes could have to do with the fx loop and freq adjust?

They referenced that as a plexi? I thought the plexi era was long over by the time this amp was built

 

[charveldan]

They referenced that as a plexi? I thought the plexi era was long over by the time this amp was built

It's not a "plexi" it's a 70's metalface 1959.

 

[Fe911]

My vote goes to 1979 2203, with the "L" serial number. But what is the large blue thing between the transformers that is taller then the tubes?

 

[Mr. Bones]

My vote goes to 1979 2203, with the "L" serial number. But what is the large blue thing between the transformers that is taller then the tubes?

+1

 

[dreyn77]

maybe the last shows were in australia, england etc... hence the 240 volt fuse! I know steve maybe I'll ask him if your nice to me.

 

[Nicholas666]

I could never picture Steve+Marshall...Always Carvin....

 

[dreyn77]

Its probibly the SAME F...ING AMP under the vinyl! In guitar player mag there is a pick of steves gear with 4 marshall heads and one marshall practice combo (grey colour) they have the labels which say 'loud, louder, too much and rediculous'! Find the tab book of eatem and smile and it tells you details and speaker wattages! great news!