dragonfly's silicon fuzz face.... moddable?

[Fuzzy-Train]

^ Anybody

[petemoore]

The voltage at the collector of the first transistor should be -0.5V, and it's adjusted by the 33k resistor right?
And the collector of the second transistor should be set to -4.5V  to -5V ( i hear 4.5 is the magic number though) and that's adjusted byt the 8.2k resistor right?
  As far as i can tell we're talking about an NPN Si Neg Gnd FF...
  Only reason I say that's because I see "-" signs in your voltage measurements...
  At any rate the black battery lead goes to ground, and your measurements...don't even need polarity...as long as you've got an NPN SI NEG GND FF on your board...ground is just a reference point, eliminating the - or + signs...and indicating how many volts from ground...confused>? just make sure you aren't...black battery lead to gnd. red to V+ [33k and 330R node].

[Fuzzy-Train]

I copied and pasted some of that from a website... that's why the "-" sign is there (I'll go back and remove it)

But those that is the volts I should be aiming for right?

Should I even bother putting a pot in the 33k, or should I just do it to the 8.2k?

Thanks for the help.

EDIT: LOL couldn't edit that post for some reason.

[petemoore]

Would it be wise to remove both of those resistors and replace them with trimpots or regular (adjustable by hand) pots?
  Joe Davissons FF Calculator might worth a look for..
  I put 47k in Q1CR position, then some other resistor parallel to it to make ~33k there. Also tried trimpots, 50k...100k
  This is a 2 transistor feedback amp circuit, Q2 has much to do with the biasing of Q1...something like 1.1v or so is good on Q1C...check ROG for voltage targets. So...having a trimpot as Q2CR allows biasing in different transistors easily, Q1 'follows suit' pretty much, it's collector resistor of course can be one or more fixed resistors [I find it's easy to just start big, then parallel the value down with another R...but I leave some resistor lead to 'tag on' to above board on the first resistor..pulling 'embedded' resistors is no fun] or a trimpot or...just leaving it somewhere around 33k-47k...all to taste...the little bit of prelim testing I did with a 100k pot and 100k as Q1CR...couldn't really tell that much difference until I got to around ...what...'I'll say' 15k...I gave up messing about w/Q1CR's value and just used a 39k...lol...but read how it makes a difference, perhaps I should be chastised for suggesting just throw something in there that is 'middlin'...

[Fuzzy-Train]

Thanks a lot for the help man, really appreciate it.... I guess you're the only one who wants to help out, it's understandable with a tired old subject like this though, very few people have the patience for it anymore I guess LOL.

I'll just do a whole lot of research and tweeaking and see what I come up with.

Thanks again for everyone's help though, I really learned a lot about the mysterious fuzz circuit.

[aron]

Please check out this thread from the schematics forum:

http://www.diystompboxes.com/smfforum/index.php?topic=34866.0