Sunday, 28 February 2016

Pro Analog MKIII Fuzz

Some info about the original:

The Pro Analog MK III is a slight twist on the famed Sola Sound MKII Professional circuit- One of the greatest sounding vintage Germanium Fuzz guitar effects pedals of all time! The ProAnalog MkIII Fuzz pedal features a slightly wider dynamic range between low gain and high gain than the MkII. It is also designed to work nicely in the chain after Wah Wah pedals- something not all fuzz pedals can claim to do. Sweet chewy fuzz with killer sustain that cleans up nice with your guitar volume are the Pro Analog Mk3’s claim to fame.

Each Pro Analog MKIII is hand made with the finest components including NOS Germanium Transistors and Bud Box housings. These boutique Fuzz Pedals feature top notch construction! The main goal of ProAnalog Guitar Effects Pedals has always been pure tone! Not clever names, Fancy boxes, or Gimmicky paint jobs. If you are looking for a no nonsense fuzz pedal with professional quality tone, then the ProAnalog MKIII is the right choice to make. The ProAnalog MK III is one of the best sounding fuzz pedals that we've heard! PERIOD.



Keep in mind this is a Tonebender II variant, so you can try any transistor set that would work in a Tonebender MKII, and give it a try. So keep in mind the gains and leakages. Also, while it's not written in the layout this is an PNP device so if you want to daisy change it you need an inverter.

23 comments:

  1. That strat rhythms sound great.
    When they say that it will sound good after a wah they mean after a buffer?
    I´ve got a ge/ge "fuzzy lady" that sound gorgeous, awful after buffers of course... That´s what have been stopping me building those sweet sounding germanium layouts.

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  2. The 47pf in parallel with the 100K should be 100pf according to the schem

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    1. oop. copy and paste error. can't believe i forgot to change that. fixed now.

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  3. This comment has been removed by the author.

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  5. Enjoy it fellas any questions just ask. Scotty

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  6. Build and veryfied!Very nice tones and wide range from overdrive to full fuzz.Tested with SFT325,SFT307,AC125 and 2SB54 transistors.Works best for me with hfe gain around 60 at Q1,70 at Q2 and 90 at Q3 with collectors voltages around 7v Q1,0.5v Q2,4.8v Q3.

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  7. Ha. Just ask scotty. From what I hear you were lucky 2 receive one of his pedals back in the day. Hopefully his new ones being sold by distributors, Will restore his reputation. Cause he's one of the best. I buy his originals whenever I get the chance. That said, Q3 Shoot for 65hfe hi leakage. Q1 and 2, 50 to 60 no leak.

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    1. Yes sir. I actually still sell direct thru eBay and yes, I am slowly restoring my reputation once my new model of original fuzzes are out. It's a slow process in getting to make amends as Rome wasn't built in a day ya know. The people who I have on my list to get pedals to all have been terrific and very nice and understanding.
      I'm grateful for the opportunity to be able to restore ProAnalog Devices to a level of reputation as an original professional guitar effects company that is product and customer focused.
      ProAnalog Devices.com

      Scotty

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  8. That's awesome. You and mr. main are my 2 favorite builders of all time. Genius. My mk3 you built, is like my wife. What's the diode in the original actually for?

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  9. Thank you for posting this schematic. And thank you zach for the layout. Best fuzz ever. The world needed this

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  10. Is that a 100uf box cap to the left of Q2 or should that be 100nf ?

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    1. correct. i also caught an error. that cap should actually connect the Collector of Q1 to the Base of Q2. layout has been corrected.

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    2. Two quick questions: 1. Anyone have a link to the schem? I can post the one I drew but mine doesn't cleanup all that well.
      Has anyone who's built this from the layout above been able to achieve similar vol cleanup as in the clips?

      Cheers

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    3. There is a schematic in forum/unverified direct from scotty from proanalog.There is also a layout here which i use and i can verify that works.

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    4. This layout is verified as well. So you can build without concern.

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    5. Awesome thanks. Time to buy more transistors. If I use NPN and apply the voltage properly would you expect similar results?

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    6. the short answer is maybe. if you're going to switch the transistors from PNP to NPN you're going to need to reverse the electrolytics.

      as far as tone goes the tone will change base on the transistors you're going to use. this holds true for even trying different PNP transistors, as each type has their own tone/sound. you're also going to want to make sure that the transistors you use are in the right gain ranges and leakage to sound and bias correctly. for tonebenders you want to make sure Q3 has a good amount of leakage, while Q1 & Q2 you want a little as possible.

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    7. That leakage guideline applies to the MKIII (3 knob tone bender) where Q1 and Q2 are used in a Darlington pair. This is called "MKIII" but is actually a slightly modified MKII, so approach it as you would a MKII.

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  11. will it works with a normal 9V DC power supply? Thanks

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  12. Hello, i build it, but it doesnt work. I only get a clean (unfuzzed) Sound. The volumenpoti works. It seems that the fuzzpoti doesnt work. Any Ideas?
    I used AC125 at Q1, 2,3.

    Thank you

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  13. You and mr. primary are my 2 favored building contractors of all time. Exactly what's the diode in the original really for?

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