Was anybody successful building a JJ Rocket Boing clone using pedalPCB sproing PCB? I reflowed all my solders, checked for bridges, switched my IC for different kind of opamps without success.
The output gain is way below unity. When plugging a guitar, I get no signal at all (or so low that I can't amplify enough to distinguish it from the static noise).
With an audio probe, I notice that the signal out of the first opamp (pins 1-2 or IC2.1) in the schematic at is already way below unity. Would...

Hi guys, I am selling these tube amp pcbs:
1. Freeman BE100DLX based pcb (3mm thick pcb with 2 Oz copper) - 40$
2. S.I.R. 34/36 with plexi clean pcb (2mm thick pcb with 2 Oz copper) - 30$
3. Cameron CCV/Jose 50 based with simple clean pcb (2mm thick pcb with 2 Oz copper) - 30$
4. Fx loop - 8$
Flat shipping costs should be around 20$

Everything is verified and built few times
layout wirings are here

Cheers

A semi-original from Xotic... some RAT similarities, but plenty of differences compared to your average RAT clone.

Schematic:
xotic-sl-drive-trace-schematic.png

Full tracing journal here:

PCB available here:

hey all ..long time no post from me.
I've a TC-Helicon harmony singer that's got (I suspect) dry joints on the AC input socket.
happy to sort out that simple job buuuutt.. disassembly is not so simple. I've removed all screws and the thing (built pretty darn solid) wont come apart (base from upper housing).
anyone know the trick to get these apart?
fwiw, their service site appears to have the odd loophole, so I found the schematics (link below).. if the link gets tightened up I'll post here if...

anyone have one of these they can open up?

the original 1176 is crazy expensive these days. i thought it'd be pretty elaborate, but looking at the original 1176 schematic, seems like a couple JFETs and a some BJTs. presumably the pedal removed the 5532 differential input. and the marketing doesn't mention any transformers so i guess they skipped that too. runs on +30V and -10V, nothing too crazy.

they're charging $359 for a pedal clone, and i bet most of that price is just based on the...

Hi to all.
Maybe you, like me, have a lot of germanium pnp transistors that have a small beta (20-30)? And you don't know where to apply them? I have the same problems :)
And I thought that it is possible to apply them somewhere and found some solution. The essence of this solution is as follows: the first stage should be a silicon npn transistor to significantly amplify the signal and solve ground problems, then two stages on germanium pnp transistors, and then a silicon npn transistor...

Hi all, I have a tc electronics t2 (digital reverb). It’s generating its own noise, when I change the reverb settings I can hear that it has an influence on the noise. I have audio traced the signal to the ak4556 ad da ic. The signal gets to there then seems to have the noise on pin 8. I’m wondering if this means the ic has blown? I can’t find schematics unfortunately. Thanks all

I want to use two 12 volt filament transformers back to back followed by a voltage doubler to power a marshall style tube preamp. The voltage doubler is a full wave bridge rectifier with two of the diodes replaced with two capacitors. (You all probably allready know this.) My question is how large and what voltage should the capacators be? I haven't found many schematics on this but the ones I've found range from 10uf to 330uf. I'm using two 12ax7s. The voltage doubler is converting 120 volts...