I have a Sound Fuzz-Wha-Volume (don't remeber the model number). The circuit is a Cry Baby copy, it uses a double pot (one half is for the volume) driven by a steel lever. It's one of the worst whas ever built by man. In fact, it's not wah , it's more like ___ah , the low end of the travel is unuseable, the sound gets too quiet and muffled.

The fuzz part, IIRC, is like one of the CCDB fuzzes that were published in Nova Eletronica.

The footwitches are light duty cheap plastic DPDTs.

The Analog Delay: 3 SAD1024!!! It remind you of the original project?

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A good friend sent this to me as an early Christmas present ! (Thanks D !!!)

Photo's are pre-cleanup ...time to bust out the chrome polish !

Basically a Superfuzz & wah combo .

AG - any idea what all the unused space on the PCB was for ?

anyone knows anything about this pedal? looks interesting!

trucker phaser

from ebay:

Thanks, this pedal is very interesting and it doesn't seem a simple tremolo + eq, as stated on the auction description.

The signal is splitted in three (high, mid and low), and each frequency band has his own tremolo.
What I like is that bass and treb tremolo share the same LFO, but it's opposed in phase: I wonder how it could sound like!!!

Mmmmmm... four legged J-Fets...

particularly interested in the fuzz part of this circuit.

anyone?

I think I went a bit overboard on this, and now disappointingly it barely gives unity gain when maxed out! The tone and fuzz controls work backwards. Which circuit is this one?

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Sola Sound Carlsbro Fuzz 00.jpeg Solasound Carlsbro Fuzz 01.jpeg Solasound Carlsbro Fuzz 03.jpeg Solasound Carlsbro Fuzz 04.jpeg Solasound Carlsbro Fuzz 05.jpeg Solasound Carlsbro Fuzz 06.jpeg Solasound Carlsbro Fuzz 07.jpeg Solasound...

I don't think I seen these before. That has to be the most spartan use of perfboard
I've ever seen. I just wish the part numbers on the xistors weren't obscured. :!:

See the art department expanding design by leaps & bounds--

I wonder how it sounds... :)

Cavagnolo is a company making accordeons, but they also made some synths (in the 70's or 80's?).

I just bought this on eBay:

it's a tremolo/chorus, but the chorus seems to be a phaser (with a sawtooth modulation wave: I\I\I\I\I\I\). Speed and depth are controlled with the trimpots behind those holes in the bottom plate.

Here are some better shots of the inside...

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Top Gear Rotator

A big sorry to Analogguru, I overbid him when I bought this...

The smaller brother of the Sound Rotator?

I noticed that this pedal (pots, the metal part of the housing,...) looks a lot like the Grizzly Fuzz, so analogguru I'm almost 100% sure you were correct about the link between that pedal and the Top Gear Fuzz!

Sorry, now I have to go and test it (don't even know yet what kind of modulation effect it is :p)

This is something for bajaman cause the british seller claims that it has been made in New Zealand which I have never seen before - the Jansen Twin:

sadly there are no guts, but you can buy it here:

analogguru

In this auction:

we can find these guts from an Colorsound Fuzz4:

So lets have a look what we can see:
4 transistors, 2 diode pairs, an 39k input resistor, 15k collector resistors, 470k from collector to base, 100k from base to ground, 100 ohm from emitter to ground....
39k in the tone control section.... 100k potentiometers, 390k from Vsupply to the base of the output transistor and 10k at the collector....

The only question is, why a red wire is connected to the ground.... because the -...

If you look at this 'original factory schematic:

Keep in mind that you saw a 33k resistor that isn't listed in the part list AND is marked R12 instead of R11 in a different hand-writing. I know photoshopping skills were poor in the hippie days, but my question is, is this a correction on the fact schematic or a correction somebody did on a copy of the schematic?

The 33k is there in all later version (sometimes 100k). Does anybody have a copy without this R12

thanks

I picked this up along with what I think is an unbranded Shin-Ei wah for pretty cheap ($50US) because the seller said they didn't work. They both work fine.
It has some weird coil enclosed in a magnetic case. Not sure what that is yet. It runs on three C cell batteries. The sweep of the footpedal is huge but the actual sweep of the pot could be better. If anyone wants me to RE it, I will. Anyway, here are some guts of the Uniwah.

Hi there, I'm not sure, that this is the rigt place, but check this link:

Some schematics are whell known by most people here.

Good luck

Older DOD 280 optical compressor, almost identical to the later version. The compression pot was a 5M. Pots were soldered directly to the PCB.
This was a basket case on ebay when I picked it up with no knobs, no FS and a jack missing. I choose some old knobs out of the bin that looked good.
I have the schemo around some where...I'll post it when I find it.

Brown and green lead attach to a 500k rev log pot. FS is a SPST, looks like the allpass sections are connected/disconnected to the out jack.
Circuit board is inside black plastic box with Maxon logo. I had one of these back in 74.

As requested:

The pot is from 84, so maybe not really vintage, but it's rare :)

Buy it now for £150, but only one last minute bid of £50. Looks no so ok in a way: new pcb? One greenie cap? Still the case is nice and orange but the mechanics look worthless.