More rare fuzzes

[Dragonfly]

and here.....

http://www.experimentalistsanonymous.com/diy/Schematics/Fuzz%20and%20Fuzzy%20Noisemakers/

[Dragonfly]

univox schemo's.........
http://www.univox.org/schematics.html

[Dragonfly]

..and, finally...

http://members.fortunecity.com/uzzfay/home.html

[petemoore]

  There might be a few 'topologies' out there we're not yet looking at...I think most of the basic structures are represented...here or there...lurking in schematics...
  Differential amp...Fuzzrite
  Feedback loop amp...FF
  Seriesed gain stages w/Feedback clipping BMP...
  Opamp diode clippers [to ground in DIST+, fedback to OA in TS]
  ...and combinations of above types
  Fuzz , Octave, Ring Mod, Sq Wave...
  Lots and lots of circuit fragments {and 'compilations thereof" circuits}...stuff grafted from here and there...you can create and voice your own personal FUZZ...breadboard !

[petemoore]

  Discussing Fuzzes is like Discussing the similarities/differences of dog types.
  Lots of similarities [~all dogs have two eyes, four legs], all Fuzzes create clipping...
  You just about have to live with Dogs, and Fuzzes to understand the differences between them in your personal experiences.
  One CaN learn alot from people who LOVE to talk about dogs and/or Fuzzes.
  More similarities than differences, IMO we often notice even the slightest differences as our experiences ensue.

[tcobretti]

Ok.  After much searching thru the archives I found a thread where Ammscray, one of our resident experts, says:

It should be noted that the tonebender Professional MK II that Colorsound re-issued is actually the TWO transistor version (the Pro MK I), NOT the THREE OC81D's like it should have been. So in other words it's just a Vox tonebender with currently available SK3004 germaniums, but the same component values as the early Vox grey one.

Same thread:

Gary Hurst invented the first tonebender for Vox in 59-60 like I said, and this was what would become the Solasound professional MK I, which used two OC 76 trannys, but before it was released commercially and made by Solasound in Italy. It was made for local players around town and these prototypes are very rare.

A few years later Vox commissioned Solasound to make the pro MK I, and as most of you know, it was also released as the "Vox" tonebender as well, in the same casing but with a different brand name and graphics. It's the same pedal, but they didn't make too many MK I's. The early grey Vox tonebenders came in at least three different versions, and they made TONS of them, with the later ones employing the SFT363E trannys, which sound great IMO, but definitely different than the OC76's. Not too much later, out came the professional MK II, which used THREE OC81D trannys, still two knobs, and this is the one that Page used with the Yardbirds and early Zep. Made for MAYBE a year. Pretty rare. Supposedly Beck used the Pro MK I with the Y-birds, and it should be noted that both Page and Beck reportedly spent time at the factory tweaking and soldering in their own trannys! Like we do.

Here's the thread.  It's from the old forum so the posts are out of order, which makes it a little confusing at times.
http://www.diystompboxes.com/smfforum/index.php?topic=4551.msg26297#msg26297

So, here's the schem to the re-issue which is apparently the same as the Mk I.  This schem is by Phillip at Fuzzcentral.  It is very similar to a Fuzz Face.  I think most of us assumed that when the pedal was reissued they simply used the FF circuit instead of the actual TB MkI circuit.  If Ammscray is correct (and I have no reason to suspect otherwise), then the FF may well be a copy of the TB MkI.  I would love to hear if anybody's got any other theories; this is fascinating stuff.

[Moonface]

You mean this one???

[Moonface]

Ok, I worked all the resistor values up from the pictures from FuzzEffect and Pedal Porn...

Seems like a Maestro Fuzztone modification indeed...

[Moonface]

The 15R must be 1M, so I ended up like this...

[Moonface]

Oops, the gnd must be +9V and the collectors must be at -9V supply.... 

[Moonface]

When I get some f*king money, I must to try this out.... 

[The Tone God]

Looks like a Zonk Machine variant.

Andrew

[Moonface]

Looks like a Zonk Machine variant.

Yupp... I was thinking dat too...

[tcobretti]

I don't see a third transistor in the pic posted above.  I am going crazy again?

[Moonface]

I don't see a third transistor in the pic posted above.  I am going crazy again?

Look at the black, bullet-like thing in the left, then you see it.

[Moonface]

Well, can this maestro mkI mod circuit work??? 

[mac]

About the TBMI schem at the beggining of this thread, I swear I saw a note below that schem. And/Or that there is another schem that updates this one, something about the pots, all were 100k?, and no 22uF but 10uF.


mac

[tcobretti]

This comment:

    Notes from John Catto: 
    Today a friend of mine gave me a (not working - broken footswitch/one pot) Sola Sound Tone Bender. This is the three knob version built by many people on this board, including myself. There have always been some doubts about the schematic and now was my opportunity to clear this up once and for all!
    The schematics posted by RG are pretty close, the only differences are..
    1. ALL pots are 100k not 250k and no 2Mg (it appears the Yardbox is a closer clone than thought)
    2. The resister from Q2 to earth is 3.3K not 33k (It is 3.3k on RG's schem also, it's just hard to read)
    3. The capacitor that parallels the 3.3k resistor is 10uf on my unit not 22uf
    4. On my unit there is a 220k resistor between the centre lug of the tone pot and the volume.
    The Transistors are all unmarked metal can, no doubt Germanium. The can has a narrow ridge around it about a sixth of the way up.
    One more thing, I've always believed that this design is the original design predating the more fuzzface like models with 2 knobs. This one however is dated inside 21 March 1974, so perhaps it is a later design after all or at least was still made that late. The case is a very slightly shallower version of the colorsound box, with silver paint and orange/black text.
    Well there it is. I never thought I'd see one of these in the "flesh"

From http://www.diystompboxes.com/pedals/schematics.html scroll down to Original Tone Bender.

My thought is that RG probly had a pedal with slightly different components than John Catto's, not that RG screwed up when transcribing the circuit.  So, either way of building the circuit is valid.