Here's a cool schematic I think some of you guys might be a little interested in...
It was posted on the Hoffman forum, here's the post:
It won't be the Caswell mod, but I think this is by the guy who copied Stock #39 onto the Stock #36 amp which was used by Slash on AFD. His name was Frank Levi - this appears to be one of the same 'typical Frank Levi 80s mods' as I've seen described elsewhere.
I think it's fair to assume that having seen the Caswell mod he might be influenced by it in his own mods. Remember this part of the Stock #39 story?
So even though the mod isn't switchable, it still could be close to the Slash AFD amp people are lusting over. Once I get a second amp, I'll be trying all these mods.
It was posted on the Hoffman forum, here's the post:
...Also, I work at SIR in LA, and there is a marshall superlead 100 that was modified by a guy that used to work there in the 80's. I guess he did alot of steve vai and warren dimartinez' stuff. Anyway, I had to tear it apart and see what was doing, I made a schematic, and reworked my 50 watter(for the 6000 time) and good god, it is probably the best sounding marshall type sound I have heard) any way, if you guys want it I can post it for you...
...here is the preamp, the power section is basically the same as the original. I know it is not that far from the original, but it's not near as harsh as a regular marshall. and it sounds alot fatter also.
...here is the preamp, the power section is basically the same as the original. I know it is not that far from the original, but it's not near as harsh as a regular marshall. and it sounds alot fatter also.
It won't be the Caswell mod, but I think this is by the guy who copied Stock #39 onto the Stock #36 amp which was used by Slash on AFD. His name was Frank Levi - this appears to be one of the same 'typical Frank Levi 80s mods' as I've seen described elsewhere.
I think it's fair to assume that having seen the Caswell mod he might be influenced by it in his own mods. Remember this part of the Stock #39 story?
Another interesting variation between #36 and #39 was that the modification to #36 was always “on.” Whereas #39 had a metal toggle switch mounted in place of one of the amp’s four input jacks (which was used to turn Tim Caswell’s mod on and off), the modification to #36 did not include a toggle switch or any other mechanism to turn the mod off. In fact, to someone looking at the outside of #36, the only perceptible modification would have been the addition of a master volume knob. Even this master volume control would only have been noticeable to the trained eye, since it was done in such a manner as to preserve the amp’s otherwise stock appearance.
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