Favorite mods for Dunlop JDF2 FuzzFace?

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Favorite mods for Dunlop JDF2 FuzzFace?

Postby GilmourD » 03 Sep 2019, 14:42

So, about a year ago I bought the guts of a JDF2 off eBay. I think it's the older version as it has the transistors marked DMI158 rather than the reissue NKTs. It works just fine (I was actually goofing around with it on Sunday) but it's a bit wooly and gets a touch dark when I roll the volume down.

So, before I order an enclosure to put it in I was figuring I'd like to do some simple mods to it to maybe improve the clarity and versatility, which might change how many knobs are on the enclosure I order.

So, what do you guys like to do to these things? Transistor changes, I imagine, but anything else? Favorite transistors that won't cost me one of my children? Whatcha think?
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Re: Favorite mods for Dunlop JDF2 FuzzFace?

Postby soulsonic » 06 Jan 2020, 20:15

I replaced the input cap on mine with a 1uF film cap. I think this tightened it up in a good way and made it sound a bit more "clear". I think that's all I did to it. Playing with different input cap values is a quick and easy FF mod.
Maybe put several different values on a rotary switch?
Another thing I like is how a Rangemaster sounds boosting the front of it. I combined a Rangemaster with switchable input caps with a fairly stock FF together in one circuit and got the first version of my Shizzle fuzz.
BTW, there are many fuzzes out there, both vintage and contemporary, that are variations of the whole "booster in front of fuzz face" idea. Lots of fun to be had.
"Analog electronics in music is dead. Analog effects pedal design is a dead art." - Fran
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