This section is devoted to circuit analysis . This means...
requests for schematics or layouts will be moved the the Request section
messages about your sick puppy or your new Android powered phone should go into the FSB Café
debugging questions will be moved to the Workbench
useless post (containing no extra information) may get deleted to preserve the readability of the thread.
you should check whether a thread exists about the unit in question, and add your info in that thread.
you...
He sorts his germaniums into low, medium, and high gain. Just wondering if anyone knows what the gain ranges for each of those are? Is his low gain 20-30uA, 30-70uA? Seems like one person's low gain could be another person's medium.
I was merely tapped to post this, and I was in no way involved with the reversing or drawing the schem. I don't want it to seem like I am trying to take credit here. I'm just the messenger. :mrgreen:
This has been played around with a bit on the breadboard, and it is believed that the schematic below is in fact an accurate rendering of the BJFE Dyna Red Distortion. The schematic was donated to FSB anonymously. Apparently this version was...
Hello,
I haven't seen anyone do this yet, so I thought I'd get one and trace it! Please let me know if there's anything that you see that looks obnoxiously wrong, or if there's anything that you think I may have missed.
Considering only about 50 of the Rockman Ultimatum Distortion Generator pedals were ever released, and having gotten my hands on one for a time, I thought it wise to trace and verify the circuit. I spent a good amount of time, coincidentally with Robert (@PedalPCB) doing a trace of the same pedal at the same time, I took the time to breadboard the circuit based on the trace I made - but without the low-battery and buffered-bypass sections.
The complete set of notes, layouts and schematic is...
Please excuse my english!, i'm writing from chile!
i'm starting this topic since it wasn't created yet!...searching at google found this pics!
I would like to know how the add ons of this pedal are made... as everybody knows its a refined tubescreamer with active tonestack... but in the simple version there is only bass and treble so here is the first question...
how we can add to the simple bb schematic a mid control?, it necessary must be an active circuit?
Welcome, I have some gut shots of the Top Tone Light Drive (thanks to one kind person). I believe this is a Pete Cornish SS-2 without an input buffer. I have traced the pedal and I can post the schematic but I'm not 100% sure and only a few values (don't remember which) are read from the gut shots.
EDIT:
I don't have the pedal unfortunately, only gut shots.
Here is the schematic.
Kamadude1216 and I traced this over at the PedalPCB forum , but figured we'd share it here, too. So, bottom line upfront, here's the schematic:
With that said, let's start off with the gutshot (behind the spoiler).
As you can see, it's built on copperless perfboard with lots of offboard wiring. Everything is gooped with a soft black rubber that was easily removed.
Here's what's underneath the rubber once it's removed:
Unsurprisingly, it's quite similar to the Paul Trombetta...
Hello.
I traced a DemonFX Omicron Darkglass that appears to be a copy of the Omicron Darkglass Alfa. I ordered a few PCBs with the schematic I traced, and it works just like the original (Demonfx). The only thing I have changed is the switching bypass, which I have made truebypass (the original used a CD4003 and JFETS). The rest, as is. Here is the schematic, in case you are interested.
I recently bought a Surfybear Compact and after I put it on my board I had an interesting issue. The Surfybear Compact has a decay dial but it didn't work when on the board. It would always be maxed out.
After some testing the culprit was found. It was the J. Rockett Archer Ikon. After contacting Surfybear someone there explained how the decay circuit works and that loud signals could mess it up. A short search on the net showed me that other people had issues with the Archer messing up...
This huge box is a preamp to run any instrument into several types of Leslie speakers. It's got four different Leslie speaker outputs that can be used individually or in combination, unlike Leslie's own combo preamps that only have a single output. High/low level inputs, volume and tone controls and two footswitches: Slow/fast rotation and power on/off.
The unit that I traced has been modded with two extra outputs on Speakon-8 connectors and a custom speed control unit. Two resistors are...
I don't think I've seen this one anywhere so I traced mine. This is my first trace so I breadboarded it to make sure it checked out.
A few things I noticed.
- Obviously Oliver left some open lugs on the pots. I drew it as is instead of fixing it.
- I didn't draw out the TRS jacks but all four are TRS.
- The Gain pot didnt have any markings and measured at 870k. I'm assuming it's a 1M and it is definitely a C taper. Probably just a part tolerance thing.
-C101 is 4u7. I've never seen a...
So. Anyone has any information on this one? It seems to be a nice sounding overdrive.
I stumbled on a blog post with a few photos, but there's not much that can be done with those. Anything more than guessing.
I'll throw in my 2c with speculating about the JRC4558 having 1N4148s and Schottkys in the feedback loop. Gain pot at A50K could point the gain setting to be closer to Marshall Bluesbreaker than a TS. 5 transistors in all, could be two AMZ mini-boosts or any other muamp...
Traced this one real quick this afternoon. 4 layer board, all traces are hidden in interior layers. Used DMM continuity to sus it out. Not 100% on the sparkle/low mids controls, but did trace it twice and got the same result. A bit rusty on tracing though, so could be wrong.
Here are some gut shots, they're the first i've taken so let me know if I need to take more. I've started to trace it and it looks pretty similar to a Build Your Own Clone compressor.
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