MORE BOTTOM END FUZZ MOD / jessey davey fuzz

[tonefactory]

I am new to the forum and have enjoyed reading various post. I have recently  had built a 60"s version fuzz face. And have heard versions that change the output cap to .22 and input resistor to 220k  to increase bottom end and some gain. I tried this on the one i had built and it did not work. I have listened to the jessey davey fuzz and it sounds great and really fat compared to stock. What am i doing wrong or have forgot ? Is there a schematic for this mod somewhere. Any ideas what the Jessey Davey fuzz is and mods?

Thanks

[JebemMajke]

Well, I don't know what fuzz did you try to mod and how, but here is my version of fuzz face. I gave it more bottom because I use it with bass.

And q2 is any germanium npn ( mine is ac187 ). But it will work with bc549 or any other npn. You could place 10-20k trim pot in place of that 8.2Kohm ( 8k2 ) resistor bias it the way you want to. But the germanium gives it sweet sound.

This thing works great with guitar as well. A friend of mine got Santana's "black magic woman" tone with it using stratocaster. It fattens up nicely. Give it a go.

[tonefactory]

THE ONE WE HAD BUILT WAS SUPPOSED TO BE EARLY MODEL FUZZ FACE. THE MODS I HEARD ABOUT USED A .22 INSTEAD OF .1 ON CAP OUTPUT. AND INSTEAD OF 104 K RESISTOR ON INPUT A 224 K. HAVE YOU HEARD THE JESSEY DAVEY FUZZ ON YOUTUBE, THAT IS THE SOUND ! THANKS

[tonefactory]

IM USING AC 128

[pinkjimiphoton]

dude, why you shouting?


post a link to the youtube would be the best bet.

that said, alot of bassiness also comes from how you bias the face. make the 8.2k resistor a trimmer, and play with it... you can dial it in for more fuzz, or more clean/bassy.

if you want more fuzz and bass, make the input cap 2.2uf or 4.7uf.. or as suggested, up to 10uf ....it will distort a lot more, and have more range of frequencys getting into the fuzz. you may find it causes oscillation etc...in that case, a reverse biased ge diode between b and c may help.

for an output cap, use 20-47uf. but be aware, it may get real wooly and not sound so great. hell, you can go with 100uf if you wanted to, but... just experiment. when your ears make your wood wiggle, you got it.

[tonefactory]

http://www.youtube.com/watch?v=tRtf1qP7X1c

[Kesh]

what input resistor?

do you mean the feedback resistor?

idk what parts you are using without seeing a schematic. but upping the input, output and fuzz control caps are all things to try, as is using a 500k volume if you are using a 100k volume.