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hello, I'm wondering what the c25 and c21 caps are on the ultra xl etc. the pcb board diagram says they are .1 so I figured that means .1uf but when I ordered ODs they were huge, I mean GIANT! So, does anyone know what the deal is? I figure they are 50v. what kind of cap would be an upgrade...

I'd like to try some pete modded Units. I'm looking for an ultra especially. Anyone got anything?

Does anyone know how to get the Metallica Black Album tone? I've been able to get it with digital amps and tuning them just right running through my marshall jcm 800 but so far with my mts, I can't get the tone. I want to use the mts cuz it's all tube but it doesn't give that tone. The black...

Hello Everyone, I'm interested in finding my own modifications (like pete does) for personal use however There isn't much on this board about how to do that and what little information there is is scattered across multiple postings. I'd like to know what to do. I'm not looking to...

I would like to upgrade my resistors in ultra, ultra xl, etc. I will be putting the same values in, except maybe higher watt, but that's not the question. My question is as follows... what type of resistors (brand etc.) are already in the MTS modules and what type would be an upgrade? What...

if I have a 1/4 watt resister and i replace it with the same value but 1/2 watt, is that ok? Will it change the sound or be the same? Do I have to use the exact same value or is that just a minimum?

How exactly do you assemble a c3 switching unit? what parts do you need? Anyone know?

what is the standard c3 cap value for my ultra? is it .0022 or 47? I thought it was 47 (black stripe) but someone said that they are all 22 now especially if you have the blue box cap (which I have) Also, are all mods 47? (except xtc and grail of course) Thanx -stAr

looking for black stripe treadplate -stAr

Hello, I am looking for a used XTC module for under 130 dollars. Please respond if you have one and are one of the "Good guys" Thanx. -stAr

the kh-3, 1086, and grail are my favorites. however, i only have 3 slots and need a saturated lead, thunder rythm, clean, and ballsy overdrive to punchy rythm sounds. The dillema is that I have what i need for the first two with the kh-3 and 1086 and grail (i'll put two in) but I can't figure...

I have the ultra, grail, and kh-3. the mr. scary is coming. I think i'm interested in these mods, but not sure. what should I do?

I'm interested in an Ultra XL and an sl+ if anyone has one to ship. I want a striped one and possibly modded.

I want a blackface (the new black stripe model) msg me.

I have a combo 2x12 built in speakers and the speakers each say 16 ohm on them but the amp is set to 8 ohm... should i change it? Thanks, stAr

What are these? Can they be done at home? What exactly does pete Change, Is it just the bass cap mod? What else does he do?

Want to buy a modded sl+ or modded xtc who has one that they are willing to part with?