Weird fuzz face -- need some help with offboard wiring

[yodude]

Hey folks.  I have a circuit board for a mysterious little fuzz face derivative that I'm trying to box up.  I traced it and drew up a schematic that you can find in the gallery at this link:
http://www.aronnelson.com/gallery/main.php/v/yodude/WeirdFF.jpg.html

The little circled numbers are the offboard wiring I/Os that I'm not sure of.

I'm pretty sure I/Os 1 and 2 are both connected to a pot as a bias control.  I can find the pot value through trial and error.

I/O 6 under the 22uF electro has me a bit puzzled.  Note that where the fuzz pot usually goes, this circuit has a fixed resistor to ground.  I'm guessing 6 must be to a pot to ground, and this must be the fuzz pot.  What do you think?  Should I use the standard 1k reverse log taper or does this variation require something else?

All the resistor values shown are guesses.  I don't want to lift them to measure because it's a nice board.  And my color blind ass can't do much with bands.

Here's a link to a standard FF (GEO) for easy reference:
http://www.geofex.com/Article_Folders/fuzzface/fffram.htm

And if someone knows how to insert a gallery image directly, please let me know and I'll edit.

Thanks.

[frequencycentral]

6 could just go to ground - some FF varients do that - no fuzz pot.

Like this one:

[GibsonGM]

Did you come up with this? It's a little odd, lol!

I'd say yes to 1 and 2 (use bias trimmer), you can put a switch there to flip between them, in fact.
The resistor next to 6 is normally where the gain is set. You can change that to a pot, taper and value by experiment.  The cap is for AC bypass (stability).  Usually goes to ground, maybe they mean to lift it? Try it, it could be really wild, ha ha!
There isn't enough info with the pic to explain what the deal is....are you intending to INPUT to the collector of Q2 as well as the base? Etc.

If you have an image hosted somewhere else, just click on "insert picture" icon in the message box, and place its URL in there; that will embed it in email.  I use Photobucket...
Hope this helps, that is one weird looking FF!  )

[yodude]

6 could just go to ground - some FF varients do that - no fuzz pot.

Thanks for the response.  It's a good thought.  But ...
I actually know it's a three knob box (fuzz, volume, bias).  I should have mentioned that above.
Also, the circuit board uses a ground plane with its own I/O point to which all other grounded points are connected.

[frequencycentral]

OK! Well...........could was in italics! 

[yodude]

I'd say yes to 1 and 2 (use bias trimmer),

I just realized that I didn't draw it quite right in this area.  I/O 1 isn't between the resistor and the emitter of Q1.  It's connected to both the resistor and the emitter of Q2, which are also connected to each other.  Anyway, I'm pretty sure it's the bias pot.

The cap is for AC bypass (stability).  Usually goes to ground, maybe they mean to lift it? Try it, it could be really wild, ha ha!

Hmmm.  What do you mean by "lift it"?

[GibsonGM]

"Lift" would mean disconnecting the grounded lead of the cap from ground.   But it would probably sound like junk!   
Maybe those points go to 1 pot, the bias pot?  Generally a FF will take its input at the base of the transistor, and output from collector.   So, if you have 3 points left over, they are possibly for a pot.  No idea how to orient it, unless the final tab of the pot is grounded....that big cap would likely be grounded. 

[yodude]

Here is the schematic being discussed above.



Anyone ever seen a fuzz pot hooked to point 6?