My Darling Fuzz design !!!

[Steben]

Check this mini-fuzz out.
Very easy build, but way electronically more complex than the Bazz Fuzz.
High Input impedance and high gain by the sziklai darlington stage. Easy to control by guitar volume. Negative half clipping by diode, resulting in a less octave sound. Q1 should be Germanium, but with not too low a gain. Q2 can be any standard silicon.
Please try this out and feedback! thank you!

[bioroids]

Cool! looks like a 2 minute build. 

How much fuzz can you get out of it?

Miguel

[Steben]

Depends on the gain of the transistors, like uhm.... every fuzz!! 
Look for silicon transistors of 200-300 hfe. The germ should have tested gain of 100-150. Since with this circuit the effective gain for the germ will be much lower than the tested value. Let's say 20-30.
Than we have input impedance of 25*25*250= 156 kohms. This is 100 times more than a Bazz Fuzz or FF.

[Steben]

Thinking of calling it "Little Darling"...
Any other suggestions?

[bioroids]

Hi!

I was trying a configuration like this yesterday, but without the diode and with inverse polarity. I found it hard to get a really good amount of fuzz, thats why I asked. What is the function of the diode?

Luck!

Miguel

[Steben]

Well it's simple but don't make even more simple  . You should use the diode! It brings bias to the transistor.
Try LEDs also.

I really should use negative power with diode arranged like it is. With your positive power supply the diode should be reversed like in the Bass Fuzz. But then you won't get the same clipping.

I'm still figuring out how to tweak it, but without too much added complexity.

[mgrEIGHT]

so is this pretty much a pnp version of the bazz fuss?

[Steben]

Yes it is, but with sziklai.
I just realized that the circuit has a high impedance on the negative signal side and very low on the positive...
mmm, still octave ... I'll be in touch...

[MartyMart]

Hey Steben, perhaps I have this one all "wrong" ! but it looks
VERY simple ...
PNP into an upside down NPN silicon ..... yes ?
I can't get a single "peep" out of it  .... !!   

PNP  C    AC128
        B
        E
NPN  E    BC547C
        B
        C

HELP !!

Marty 

[Steben]

Long time. 

Yes, Marty, that's the pin configuration in the schematic. Maybe didn't check enough the PNP-NPN difference in pins?