Greasebox / Skeletor / Frank Face

[juansolo]

Nice pedals! I need to hear a greasebox, was tempted to make one of these on vero, I know of a couple of layouts but am weary of them being wrong... too bad 
I suppose when I tackle this, I will socket some resistors and replace them with pots to find the sweet spot.

The vero I used was this one:



I just compacted it a lot. The one to socket is the 470K next to the 4n7. Stick a pot on it and adjust. I suspect something in the region of 39-47k should work.

[jalmonsalmon]

 ah okay! thanks guys.  Is this about the same as SB carries?  http://www.mouser.com/ProductDetail/Xicon/23PS122/?qs=sGAEpiMZZMsh%252b1woXyUXj2Wk4Z3nZoF9SxDl0XPr0tM%3d

I live about 45 minutes away from where I see packages shipped from mouser so they deliver the goods about 3 days after I order stuff... So for most parts I like to use mouser.  

[jalmonsalmon]

 Heyas Juan,
I finally made a GB-83with the above layout and I ended up basically using a 500k pot for the resistor that is on base of Q1 to ground. Originally I had the 43k resistor there and it would not bias at all but as soon as I out the 500k pot on there and cranked it up... pedal works perfectly, sounds like the clips on youtube.
I think when I measured that pot it was around the 350k range so I am wondering what is wrong? 
Maybe the transistors?  lol
I have a the same BC547B / BC337   Q1/Q2  combo
anyway!  CHEERS!
Great pedal  imo.. works great with a deluxe reverb amp... has a lot of mids

[juansolo]

They'll be nothing wrong. If you read the thread on FSB people are finding wildly different resistors work for different builds. I'd just do what you did. Stick a pot in, twiddle it until it sounds good and then swap a resistor in of that value. Alternatively just drop a 500k trimmer in there.

[jalmonsalmon]

Cool, I just tuned it by ear to where it sounds good to me.
Yeah I find this GB-83 to be a great circuit for hard rock / blues stuff and it loves guitars with humbuckers and Fender amps! Has a nice midrange crunch to it and is different then any of my fuzz pedals.
Next up is a FZ-673   

[roseblood11]

I'd really like to know if DAM selects the transistors in the GB-83 for a certain hfe?