JMP Tremolo

Talk about the evolution of Marshall's.

JMP Tremolo

Postby TIV » Mon May 18, 2009 2:52 pm

I recently aquiered an old JMP head in good working condition. Looks like it´s in the original cabinet, has later/aftermarket logo and is in good cosmetic condition. On the front it says JMP, on the back it says Tremolo 50W and below that "Jim Marshall products Ltd Serial No. T/A 2375A. Can you help me date this amp? I have not had the time to open it up yet, but I will, and post a link to lots of pictures.
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Re: JMP Tremolo

Postby neikeel » Mon May 18, 2009 5:49 pm

Sounds like a 1969 or 1970 amp, but as you have guessed we need pics!
Neil
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Re: JMP Tremolo

Postby TIV » Mon May 18, 2009 6:32 pm

Hi Neil, I will take pictures back and front, and also open it up and take some of the inside.
Cheers
Throstur
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Re: JMP Tremolo

Postby 908ssp » Tue May 19, 2009 2:32 am

Should be a terrific sounding amp looking forward to seeing pictures of it.
Alex

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Re: JMP Tremolo

Postby TIV » Tue May 19, 2009 7:23 pm

You should be able to follow this link and see lots of pictures of the JMP Tremolo "as found". http://s415.photobucket.com/albums/pp23 ... 20Tremolo/
All options and info much appreciated. Are the tranny´s original, what has been changed, what should be done to bring it back to original and are there any safety precautions I should do on it?
All the best
T
P.S. And yes... on the white label is written with pencil... 25/8/69...
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Re: JMP Tremolo

Postby Brian Wallace » Tue May 19, 2009 9:29 pm

The written date is a real good indicator of the year of the amp but to make sure, can you get some codes from the remaining mustards and from the pots?
Remember....You can fix it with a little extra energy and a positive attitude. ;)
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Re: JMP Tremolo

Postby neikeel » Wed Jul 08, 2009 12:17 pm

I am confused!

Metal panel with valve rectifier?

Can someone explain? :oops:
Neil
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Re: JMP Tremolo

Postby 908ssp » Thu Jul 09, 2009 2:13 am

I don't think that is stock. I think the tube rectifier is a retro fit along with the power transformer. Look at the terminal strip in the chassis and the mess the PT wires are in not Marshall I say. All those extra caps inside make up for the one removed from the chassis where the rectifier tube is.
Alex

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