JCM 800 1987 with mysterious mod. Help?

[Texas Loud]

Hi everyone

I have a JCM 800 1987 (1984) head that I've had for nearly 20 years and enjoyed it, but I'm pretty clueless as to the mods made to it and why. I was told by someone at Guitar Center that it is a plexi, with the 2 bottom inputs turned into a tone pot and switch, along with 3 other 3-way switches along the front between the middle and treble, treble and volume 1, and volume 1 and volume 2.

Im curious if this a well known mod for this model, and what anyone might know about it. Sound wise it has a very wide range given all the toggles, with a very healthy voice for a 50 W.

ALSO while I'm at it, the 4x12 bottom cab is a weird bird as well. It's a 1969B "Original Classic Limited Edition" with dark green vinyl covering, grey plaid grill cloth, and the weird part--- gold piping. I can't find one just like it on the web, all have the traditional white piping.

I don't think my pics made it to the post. Can anyone please give me insight on this pair, especially the cabinet? Is it rare? Maybe a custom build?

Thanks!!!

[GuitarBuilder]

This will be hard without pics!

[Texas Loud]

I have good pic files to post, but the forum doesn't upload them. Is there another way to get the pics up here or to anyone else, maybe private msg or under a different category?

[GuitarBuilder]

Use the Attachment feature.....

[Texas Loud]

Tried again to attach files at the bottom with no luck. I posted them to photobucket, hopefully it works now. Please let me know if it didn't work either. Thanks again.



http://s25.photobucket.com/albums/c64/m ... =043-1.jpg

http://s25.photobucket.com/albums/c64/m ... nt=039.jpg

http://s25.photobucket.com/albums/c64/m ... nt=044.jpg

http://s25.photobucket.com/albums/c64/m ... nt=046.jpg

[clutch71]

This is an older post, but i would be curious to see gut shots. My guess is that some of the mods were done similar to what Peavey did to the VTM. The switches probably introduce different caps or resistors into the circuit.

[Mats A]

Get a good tech to look inside the amp. Maybe he can tell.