GGG Fuzz Face Resistance Values for Germanium Transistors

[sixstringphil]

I'm working on a Fuzz Face from General Guitar Gadgets with the Boutique Late 60's Modifications. I ordered the All American germaniums from Small Bear, but I can't read the handwritten resistor values. I've emailed Steve for help, but I know he's covered up right now, so maybe someone here can help me out. Here's what I can tell...

Transistor Ratings: 112 & 184

        Original Value         Replacement Value
R3               33 k                              33 k                                                             
R4             220 ohm                        680 ?                                                                 
R5                 1 k                              12 k                                 
R6              100 k                            110 k                           

It would be very helpful if someone could confirm that I have the right values, especially R4 (I'm assuming it should be 688 OHMS?)
Also, regarding R5, on the GGG page it says to omit the replacement R5 value (12k) in place of a 10k trimpot that is in series with a 1k resistor. I'm not sure I understand exactly what should happen here since the 10k and 1k only add up to 11k. Should I omit the trimmer and use 12k, or omit the 12k and stick with the trimmer/1k combo? Since I'm biasing the collector of Q2 to 4.5v, does it even matter as long as I get 4.5?

Here's a link to the schematic...http://www.generalguitargadgets.com/pdf/ggg_ff5_sc_b69.pdf

Thanks for your help!!

                                                                   

[Solidhex]

Yo

  The resistor values Steve provides pretty much apply to an unmodded fuzz face circuit. The Boutique 60's circuit is a little different. It has a pot set up as a variable resistor in series with the resistor Steve refers to as the 680 ohm one (R4). The one he recommends the 12k for is replaced with a combination of 1k and a 10k pot in series (R5 and R5T). I personally would just run a jumper for the 1k and use a 25k trimpot instead since you would only be able to get 11k with the values specified in the schematic. The 33k refers to R2 and the 110k refers to R3.
  So just build the Boutique 60's fuzz as the GGG schematic says... except use a 110k for R3. Replace the 1k with a jumper and use a 25k trimpot. If you already have a 10k trimpot then use anything between 5k-10k for R5. Its not terribly important for the trimpot to be set for exactly 12k. Set the "Contour" knob to around 12 o'clock then adjust the trimpot till you get -4.5v on the second transistors collector. Knowing Steve it probably will be somewhere around 12k. Otherwise use your ears!

--Brad

[sixstringphil]

Ok. That makes sense to me, but  one question about R4: Since it's in series with R5 and the trimmer, are you saying I should leave it at 220, change it to 680, or jumper it since the trimmer is there?

[Solidhex]

Yo

  Leave it at 220 ohms. The combination of the 220 and the 1k contour pot replace the fuzz face resistor formerly known as "680 ohm"

Brad

[sixstringphil]

Awesome. Thanks for the help!!