Not completely unrelated to this topic:

Has anyone got some uDARK gut shots?
I'm currently tracing a Stamp, that seems to be the same circuit, but it uses all unmarked smd caps.

thx

Been tracing the Stamp, this is what i have so far: not sure about C58 placement or whats below U2

i need more detail in this area front and back, plz

Hi guys, i've been looking for gut shots to try and trace the Micro Dark and, judging by this video https://youtu.be/V7HC1jDaIVI , and these 2 images orange micro dark count.jpg terror stamp count.jpg i came to the conclusion that both these amps are the same thing except for the extra volume on the...

Thanks for sharing, great work. :thumbsup Can you please also share the read voltage values of Ub, Ua and Ug of both stages? Thanks man! Glad to help! I would if i could cus' unfortunately i don't have a multimeter handy(yes i did all of this blindly, fortunately it didn't catch on fire :slap: ). B...

Update: I did further mods to the clean channel and to the drive channel's tonestack. Schematics: Clean Valvestate Vulcano CLEAN TS mod.png Dirty + new TS Valvestate Vulcano GAIN mod + TS mod.png Here's a little sample, with some generic riffing going from the clean channel to the dirty channel(OD2)...

Manfred wrote: ↑05 May 2021, 06:55 Sounds great!
What is the setting value of Trim1?

You can set it as you will, it will work at any setting except 0(cuts out).

Alright, as promised, here are some samples! And also, i finally managed to get my gain mod working, so that's what you'll be hearing, with no pedals whatsoever except for the two samples in wich i used a modded Marshall GV2 as boost. Cheers! :D vavestate_vulcano gain mod schematic.png IMG_20210504_...

I tried disconnecting the feedback loop and that didn't work. It gets really farty whenever you hit a low note. But, i did add Modern/Vintage switch to the tone stack of the dirty channel that basically switches between the classic Marshall TS and the Mesa Recto Orange channel TS, and it works great...

i did not! But i'll try next time i open it up. Should i disconnect R69(1M) as well as C54(100n) and R95(220k)?

You could also experiment with just removing the global negative feedback loop around tube stages of the original design. It's what keeps the gain so low that the stages run clean with the given input signal range (limited by clipping LEDs). The solid state input stages are also already introducing...

it isn't doing much(just a clean stage followed by a buffer), The DC-coupled cathode follower is a bit more than that, and some say it's the key to the "Marshall Sound". More info there : http://www.valvewizard.co.uk/dccf.html Yep. That's why i was trying to find a way to adequately repla...

Hi everyone, So, last year i aquired this beautiful thing: g100.jpg It's a Meteoro(a brazilian manufacturer) Vulcano G100 100w 2x10, and if you look closely to its panel, it clearly shows its roots: it is basically a Valvestate 8080 copy (a weird copy, with a Valvestate preamp going into a Gallien K...