Tuesday, 6 March 2012

Foxx Tone Machine

So I may as well include this one too.  Manufacturers info:

Manufactured for only a few short years in the early '70s, the fOXX Tone Machine was stomped mightily by artists ranging from ZZ Top to Adrian Belew, Parliament-Funkadelic to Peter Frampton. Its legacy has lived on as a new generation of artists (Nine Inch Nails, Beck) has discovered the fat-backed, fuzzed-out sound that screams (in a very fuzzy way, naturally) fOXX Tone Machine!





42 comments:

  1. Damn! Sat down to do this and haven't got any 220R's... could I run two 100r's parallel to make 200R? and even run a 10r too to make it up to 220R?

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    1. In series mate, if you put them in parallel you'll end up with round about an 8 ohm resistor. Having said that, all that resistor does is set a minimum level of fuzz which stops the effect going silent in the fully counter clockwise position like the Maximus does. Just use a 100 ohm instead which will let the pedal go lower gain than stock, but keep exactly the same "full fuzz" sound.

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    2. Haha Doh!.. Ok mate, cheers. That sounds like it might be better.

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    3. http://www.1728.org/resistrs.htm

      Used this for WLUD666's switchable power input resistors..
      +m

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    4. Cheers mirosol..That'll come in handy I'm sure.

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  2. Well It fired up first time and what a beast it is!! To me it sounds like the perfect mix between a Meathead and a Hyperion. And octave up is perfect, not too piercing like a lot of others..

    I put her in a little black hammerite number ;o)

    http://img546.imageshack.us/img546/6141/foxx.jpg

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  4. Last time I made this i used a toggle, How would I wire up a DPDT stomp with LED?

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    1. I think it should go just like this:
      http://mirosol.kapsi.fi/varasto/boxes_other/FTM_DPDT.png

      Assuming that the upper octave is on when switch is shorting SW1A and SW1B :)
      +m

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    2. Cheers Miro, much appreciated ;o)

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    3. That is very helpful. Anode to +9V... Correct?

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  5. Can't get the slightest sound out off this, so freakin weird. Had similar problems with the Fender Blender build. All the transistors voltages match those provided by GGG but still almost no sound. I probed the circuit and there is sound up until diode 2. Any tips?

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  6. Just finished building this, it'll pass a signal but it's really quiet. I checked all the transistor voltages and they're in line with the GGG values. Any suggestions where to look? I've built a few of these that have worked fine, never had this issue before.

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    1. The times i've had similar issues, there have been a slight short around the output, leaking the signal to ground... Since the voltages are ok.. Have you guys tried probing the circuit to see where the signal dies?
      +m

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    2. Actually have two of these going right now, one works and the other doesn't. After a bit of poking, D2 measures 4.3 on the anode, and 4.25 on the cathode on the one that works, while the one that doesn't measures 8.4 and .04

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    3. So it could be a burned diode that passes most of the signal straight to ground. Have tried swapping those diodes?
      +m

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  7. Just finished building this and what a FUCKING SEXY BEAST!!!11 hell yeah probably scared a couple of neighbours. thks Mark for the lovely layout!

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  8. JUst build this effect. Love it, very loud an sharp, so it has been boxed in a matter of hours. Only thing is that the B50K for volume is overkill, on next builds I'll use a log, as the volume is useless from 9 o'clock.

    Great octave, but the Tycobrahe remains the best for me :)

    BR

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    1. For me the FTM has the most pronounced octave and useable non-octave fuzz versus the Tycobrahe, Scrambler, and Fender blender. Different strokes...

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  9. Hallo, some of you have experimented an effect like if the sound was coming and going, kind of wave, while you sustain the notes? I didn't build it from this layout, used one I found, but I don`t know if this may be caused to transistors gain or it could be something else..
    Thank you,
    Sergio

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  10. Any chance someone could show a version with a "swell" knob on this like the Prescription Electronics Experience?

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    1. ...It's my only Christmas wish.

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    2. what i could find: http://s114.photobucket.com/user/rousejeremy/media/swellvero.png.html
      Don't know if it's the same as the PEE

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    3. http://user.eduhi.at/aquataur/aquataur/musicstuff/swell.PDF
      and http://web.archive.org/web/20000928141340/http://www.geocities.com/CollegePark/Library/1355/experience.gif

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    4. I'd cast a vote for the Experience Pedal too.

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  11. Volume 2 to Output, Fine. But I can't see volume 2 or output on the verobard.. ? Nothing comes out of it?

    What about my 3PDT wiring?

    Thanks,
    JP

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    1. So you basically didn't get it.

      "Volume 2" is the middle pin of your volume pot. The wire you solder to that lug is your output.
      +m

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  12. is that ok to substitute de 3nf for a 4.7nf? would i get more bass?

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  13. Heya,

    This is my first pedal. All the voltages are lining up with GGG except the collector on Q2, which is showing almost all of the voltage source. Only about 40mV are dropping across the 4k7 and I'm pretty certain the node isn't shorted to the voltage supply. Wondering why this is.. my circuit is passing signal but it doesn't seem quite like it should. The fuzz on it is crazy! Also, my D2 node voltages differ from the earlier post by E.G.

    Any tips would be greatly appreciated! I am using 5088s instead of 3536, but all my diodes are authentic 1n34a

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    1. Bah! was simply missing the 4k7 from the emitter on Q2. Doh! works great now. awesome layouts on this site - I will try and keep these sorts of comments to a minimum in the future. Thanks!

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  14. I've built/owned/played countless fuzzes and distortions. This one is amazing. Maybe it's just my build, but I love it. About to build another for a friend...

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  15. Can you please illustrate how to wire up a 3PDT stomp with LED for the Octave control?

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  16. Is there a way to add a trimmer to the octave section somewhere to make the octave more pronounced?

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  17. my Foxx Tone Machine, built circa 15 years ago, still rocki'n and sounds great :P

    http://s1.postimg.org/4ohr29ka7/IMG_0403.jpg

    2N3565 in this one

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  19. I built this one last week as well as the EA Tremolo. Cool fuzz! It came together and worked beautifully. I used PN3565 transistors, which should be very similar to the original, even the name is almost the same. These are just plastic package transistors. Others may work as well but I highly suggest these. I found them and the diodes on Tayda.
    Photo of it: https://plus.google.com/103511243237729093812/posts/Rjz9AKXPckr

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  20. Hi!For people like me who want to reduce the gain (Sweet and more controllable) suggest you replace 10uf cap on emitter Q3 with 1uf.

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  21. This one is just plain nasty...in the best way possible.

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