Mid-Fi Electronics - Demo Tape Fuzz  [traced]

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Mid-Fi Electronics - Demo Tape Fuzz

Postby Beedoola » 08 Sep 2013, 22:16

Anyone have one/good take some gut shots? Or have any info on the circuit?
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Re: Mid-Fi Electronics Demo Tape Fuzz

Postby 9520575 » 28 Dec 2013, 01:05

here.

This is my first trace ever. Sorry if there is any errors. I've build this using this schematic I made, So I know it works
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Re: Mid-Fi Electronics Demo Tape Fuzz

Postby Nocentelli » 28 Dec 2013, 15:03

Thanks for this. Looks like it works just by slamming the rails to create clipping: I might try a diode pair across the opamp feedback loop on a switch. Unverified vero of the stock circuit here:

download/file.php?id=23161&mode=view
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Re: Mid-Fi Electronics Demo Tape Fuzz

Postby Nocentelli » 28 Dec 2013, 19:01

This is A LOT of fun: Don't bother with the diodes, bashing the crap out of the 4558 sounds lovely by itself. I'll probably use log pots for volume and treble, it is exceptionally loud and bright with the linear pots specified in the schematic.
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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Re: Mid-Fi Electronics Demo Tape Fuzz

Postby 9520575 » 01 Jan 2014, 15:33

Nocentelli wrote:This is A LOT of fun: Don't bother with the diodes, bashing the crap out of the 4558 sounds lovely by itself. I'll probably use log pots for volume and treble, it is exceptionally loud and bright with the linear pots specified in the schematic.


Loud and bright thats the pedal. I rarely turn the volume past 25%.
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Re: Mid-Fi Electronics Demo Tape Fuzz

Postby pinkjimiphoton » 20 Feb 2014, 00:18

nocentelli, is your vero verified yet?
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Re: Mid-Fi Electronics Demo Tape Fuzz

Postby Nocentelli » 20 Feb 2014, 01:18

I haven't actually built it, but that doesn't mean it won't work! (no guarantees it will, either...) :wink:
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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Re: Mid-Fi Electronics Demo Tape Fuzz  [traced]

Postby Intripped » 22 Feb 2014, 15:44

a more readable schematic...
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Re: Mid-Fi Electronics Demo Tape Fuzz

Postby 9520575 » 22 Feb 2014, 15:54

:oops:
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Re: Mid-Fi Electronics Demo Tape Fuzz

Postby Intripped » 22 Feb 2014, 16:13

:mrgreen:
thanks for YOUR schem buddy!
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Re: Mid-Fi Electronics - Demo Tape Fuzz

Postby doug deeper » 24 Feb 2014, 16:04

The diode goes in line with v+, not to ground, and add a 47uf cap from pin 5 to ground.
Then it's 100% correct.

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Re: Mid-Fi Electronics - Demo Tape Fuzz

Postby Intripped » 24 Feb 2014, 19:10

updated schematic and ...
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Re: Mid-Fi Electronics Demo Tape Fuzz

Postby Nocentelli » 03 Mar 2014, 20:48

pinkjimiphoton wrote:nocentelli, is your vero verified yet?


OK, this one is now verified:

Demotape_vero_nocentelli_verified.gif


In my actual build:

I used a C100k pot instead of the 25kB for trim, giving a wider range of lower gain sounds with humbuckers which tend to overload it. I also used log 100k pots for volume and treble, putting the most useful settings closer to noon.
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Re: Mid-Fi Electronics - Demo Tape Fuzz

Postby doug deeper » 08 Apr 2014, 20:57

Also,
There are a handful of 4558 versions of this pedal, but all the newer pedals use a TL072.

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Re: Mid-Fi Electronics - Demo Tape Fuzz

Postby Rooster72 » 09 May 2014, 07:57

Intripped wrote:updated schematic and ...

Nice work guys, interesting to watch what you guys do after a person has been doin it for awhile.
Would this schem. be verified yet or no? Id like to make an etching but I am very new to building, wish I would have done this years ago. I can see this is going to be a time bandit. Not for me of course ,but others who might be waiting. Ehh Ill give em a stomp for Christmas.
Really love the sound on this baby, instant, thats it reaction...
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Re: Mid-Fi Electronics - Demo Tape Fuzz

Postby roseblood11 » 09 May 2014, 14:46

Yes the schematic is verified. Why etching a board for such a simple circuit? Nocentellis layout looks good, if you use that, you can build this pedal in one hour...
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Re: Mid-Fi Electronics - Demo Tape Fuzz

Postby Rooster72 » 10 May 2014, 23:47

roseblood11 wrote:Yes the schematic is verified. Why etching a board for such a simple circuit? Nocentellis layout looks good, if you use that, you can build this pedal in one hour...

ok ,well I will go with your advice.
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Re: Mid-Fi Electronics Demo Tape Fuzz

Postby VanPorter » 18 Aug 2014, 04:34

Nocentelli wrote:
pinkjimiphoton wrote:nocentelli, is your vero verified yet?
Nocentelli wrote: OK, this one is now verified:


Hi, I need to know if it's necessary to put the diode and the 1M resistor, because they are in the above circuit but not in this one. If so, the diode goes between 9V and the 47 micro cap in row i? And the 1M resistor goes from "row e - column 1" to row h (ground)?

Thank you for your help!
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Re: Mid-Fi Electronics - Demo Tape Fuzz

Postby Nocentelli » 18 Aug 2014, 16:12

Yep, the 1M could be mounted on the footswitch if you don't want to add an extra column to the left hand side of the vero; The diode won't fit on easily without a bit of rejigging the layout, or a bit of a kludge with the diode wired point-to-point from the DC jack to the veroboard.

I don't think either are particularly neccessary, it doesn't pop with grounded-input footswitch wiring, so the pulldown is not needed. The power diode will drop the voltage slightly, which might affect the sound slightly, but I doubt it would be noticeable.
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Re: Mid-Fi Electronics - Demo Tape Fuzz

Postby VanPorter » 23 Aug 2014, 20:15

Just built it, and it's really great!

I tried it with a Schecter Demon 7, and it's really powerfull! The thing I've noticed is that when the trebble is at minimun or maximun, a "piiii" noise appears, but if I put it at 9,5, it disappears. I used a 500K linear pot, could it be that?

Thank you very much to Nocentelli for his vero!!!
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