Recent content by Blackboarcult

Really, really cool idea! I can definitely see that working as a metal boost. But the wabbit jammies steal the show :D

I was under the impression that, the smaller the values on the voltage divider, the lesser the noise. Making it 10x does not increase noise, according to Spice... Interesting! 1Meg and 1uF do boost the gain and lower mids a little bit, but difference is minimal. Onwards To The Breadboard!!! ⚡⚡⚡

Thanks Chuck, I'm finally wrapping my head around muamps. So much to tinker with here... Ok, so all else in the circuit being equal, if I wanted to use J112 on Q4 and 2SK208R on Q3 (I like them a wee better than J201, more gate clipping and nice tone when source is directly tied to ground)...

What could be the purpose of R5 and R15? They are on the wrong side of the cap-to-gate to be an SRPP (à la Catalinbread), and I do not see that they affect the amount of gain of the stages, or the gain-to-load ratio either. The only thing it seems to do on my sim is lift the signal 1.3 volts...

A part of me is disappointed by the plexi schem (one single clipping stage, and with 1N914, really?). A part of me yaps about the importance of voicing over clipping devices, and somerhingsomething learning how to use inverting stages in such an elegant and simple fashion. But then a part of me...

Personally I wouldn't touch that pcb. If you REALLY insist, replace R4 or R8 with a c10k pot for a presence control.

Oooh, I see what you did now with the freq pot. I can't f**** visualise things without spicing them... I might indeed lower R12 to 100k for a broader Q, and change C6, C8 to 2.7nf & skip the switch - I don't think I'll ever want to boost under 400hz or above 3k. I did find a ganged B20K among my...

Awesome, can't wait to hear that! One thing to consider - if we max the tone controls, the opamp's gonna clip due to the amplitude coming from the last bjt. It'd be better to stick e.g. a 68k-33k voltage divider before the buffer to make sure not to hit the rails at the EQ...

That's a beaut'!!! I really need to breadboard this one when I'm done with my current preamp (or when I scrap the whole thing in frustration, 50/50 odds...). I will have to scale up values, since I only have C100K ganged. I've been wanting to do the perfect 80's boost with a compressor into a...

Check the GK Rails - might be exactly what you need. SS poweramp grit that gets growly and throaty if needed. Circuit info here.

The AMT P2 gets really, really close, but I don't know if there is a pcb for it anywhere. Otherwise, the Baja EVH and its subsequent version by dylan are quite nice too, a tad undergained though, compared to the original amp.

THIS. The frequency response of the Metal Zone is extremely similar to that of the VH140. I've been procrastinating on adjusting the VH140 to exact Metal Zone frequency specs and adding the tone stack from the GK 250ML after it for a good three years now (I'll get to it, I swear!), but it's...

I wasn't aware of this pedal actually, thanks! This looks familiar... Yamaha G100-II:

What's the deal with the 100k resistors to V+ at muamp output on the XTS Atomic (Nucleus Overdrive)? Referring to R12, R15, R37 on PPCB schem. From what I see, all they do is lower the gain a tad, due to load, and keep the drain of the lower jfet at a voltage ever so slightly higher than the...

It's nice that the compressor looks quite simpler than on Rockman circuits. do you have to do any matching on it, or the average mmbfj201 will work ok? I don't think I've seen a scholz-comp circuit without trimmers or hand-picking jfets before.