Silicon Tone Bender

Original effect designs complete with verified schematics, layouts and instructions. All project were freely contributed by members and cannot be used for commercial purposes without consent of the respective owners of the copyright.
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Hides-His-Eyes
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Post by Hides-His-Eyes »

Well, wanting to invert the signal there is sensible enough since the signal going into the tonestack is inverted. However it won't work as drawn because the AC signal going into the volume pot is shorted to ground through the smoothing capacitor. Easiest is probably to take it off the emitter and let it invert, otherwise you need to reconfigure that recovery stage some way or other.
Testing, testing, won too fwee

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Post by mictester »

That doesn't look like a "recovery" stage to me - it hasn't got any voltage gain! You need to very lightly load the James circuit (it's actually NOT a Baxandall), and it's lossy, so a bit of gain is really a good idea. An FET stage is sensible there!
"Why is it humming?" "Because it doesn't know the words!"

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HEAD
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Post by HEAD »

Yes, you're all right. I messed up the stage after the james (:P) tone controll. Did this today morning between two lectures and it's still on my breadboard which is kinda messy at the moment. I was pretty much copying this one: https://www.freestompboxes.org/download/fil ... &mode=view but tried to avoid the extra output as thing realy don't need that.
I'll gonna try something with a FET output stage - just some more research and reading. :D

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Post by JOHNO »

Built this one yesterday. Great sounding fuzz. Thank's Mictester. I designed a new layout for BCE type transistors. If anyone is interested i can post the vero layout.
Photo 4.jpg
Photo 5.jpg

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mictester
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Post by mictester »

JOHNO wrote:Built this one yesterday. Great sounding fuzz. Thank's Mictester. I designed a new layout for BCE type transistors. If anyone is interested I can post the Vero layout.
Nice build!

I built one a few weeks ago using a CA 3046 (transistor array) just to confuse a friend of mine. It actually turned out better than I expected, because the transistors in the IC are quite low gain! My next effort will be a "Superfuzz" using the "long-tailed pair" in the 3046 for perfect octave balance.
"Why is it humming?" "Because it doesn't know the words!"

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Post by JOHNO »

Can wait for that. A super fuzz would be fuckin cool as. Always wanted to build one since I saw Greamy's (or something like that) video on you tube. But I forgot to put it on my list, it's on there now. You can never have too many fuzzers. :thumbsup And I'll just say that this tone bender kicks fuckin arse. I've build a few GE one's including the soul bender but this shit's all over them.

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mictester
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Post by mictester »

OK. I'll get the scribbles out of the notebook and onto this computer, and sort out a neat Vero layout for it. I've built LOTS of them over the years, and the ones using the 3046 always sound best!
"Why is it humming?" "Because it doesn't know the words!"

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Post by Nocentelli »

mictester wrote:...and sort out a neat Vero layout for it.
:thumbsup
brownwhopping wrote:How can I learn by reading threads an making circuits, when some day I can see a lawsuit or somebody beat me in the face for that?

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Post by HEAD »

Hi,

I've been pretty successfull making a nice 5 knob version based up on this. Best fuzz I've ever tried yet. As soon as I have some time I probably make a complete project file out of it.

Helge

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Post by Nocentelli »

HEAD wrote:a nice 5 knob version based up on this... I probably make a complete project file out of it.
Sounds great - Please do.
brownwhopping wrote:How can I learn by reading threads an making circuits, when some day I can see a lawsuit or somebody beat me in the face for that?

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Post by HEAD »

Just had a little spare time:

Image

The most versatile fuzz I've ever built. :thumbsup

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Post by HEAD »

ibodog2 wrote:
HEAD wrote:Just had a little spare time:

Image

The most versatile fuzz I've ever built. :thumbsup
Did you make any changes from the schematic you posted above?
Yes, I changed the values of the james tonestack to the ones CB used in their manx blablabla. Suites it very well!

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HEAD
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Post by HEAD »

That's my pcb so far. Ignore the 2nd 5k trim pot - I used a 100k at that place. Since it was that usefull I decided to make it an external pot, called "charge" in my built.
Image

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Post by azrael »

Nice! How did you do the graphic?

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HEAD
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Post by HEAD »

azrael wrote:Nice! How did you do the graphic?

Inkscape, patiences and back on decals originally meant for decorating your own mugs and dishes. ;)

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Post by Rolbista »

is there a way to increase gain by swapping some resistors, or should I just buy some hi gain trannies like 2n5088? I've built it and gain at max is medium at best. Q's are 2 BC109 and 2 BC546, before, they were all BC108 with hfe around 150. Cheers.

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Post by Nocentelli »

Rolbista wrote:is there a way to increase gain by swapping some resistors, or should I just buy some hi gain trannies like 2n5088?
Mine has BC109c throughout and it's pretty gainy at max, have you got the trimmer on the abuse pot, maybe give that a wiggle? mic mentioned early in the thread replacing the abuse pot with a 2k for a greater range.
brownwhopping wrote:How can I learn by reading threads an making circuits, when some day I can see a lawsuit or somebody beat me in the face for that?

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Post by Rolbista »

hm, I'll give it a try, thanks

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Post by Rolbista »

Problem ahead! Bender is VERY noisy, gain is still fuzz face-ish at best, trim pot doesn't help anything, different transistors either. Are there some sensitive spots on the board where a short or wrong value might cause such drastic effects? any common problems with that? Sound isn't very Tonebender - like. Yo.

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Post by LaceSensor »

I built one of these tonight.
Its awesome and worked first time !

Thanks for the sweet circuit and layout

Image

Image

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