Categories
Effects

Oink You Very Much: Meet the Porkolator!

It was a longer and harder process than I’d ever imagined, but the first of my four new pedals is finally released and in stock now at Vintage King.

Here’s my product demo:

And here’s a just-posted “First Look” video from John Bohlinger at Premier Guitar:

Man, it’s always such a trip when you tinker with an effect and play it in isolation for years, and then hear it being played by someone else. But I couldn’t be luckier: The first person who ever played one beside me was the stupefyingly talented Blake Mills. (He dug it, and he got the very first production model). And now, another performance by another of my favorite players. Pinch me!

There’s lots more info about Porkolator on the Joe Gore Pedals product page. As I explain, this is a highly mutated version of a circuit that was pretty bizarre to begin with: the Interfax Harmonic Percolator. There is so much bad info about the original pedal floating around. Everyone seems use a couple of phrases over and over: “tube-like” and “even-order harmonics.” Wrong and wrong! Everyone’s just copying something (incorrect) they read somewhere else.

A few years ago, I did a story on the Harmonic Percolator and its boutique DIY spinoffs. Even if you don’t especially dig the pedal, it’s an interesting study in how an effect gets tweaked and modernized. Here’s the accompanying video.

At the end I demonstrate an early version or Porkolator, though it’s changed so much that you can’t really compare. I gave this original to famous drummer and not-as-famous guitar player Matt Chamberlin during a film score session. Like many of my hand-built prototypes, it promptly broke. Fortunately, the new ones are built by the talented professional at Cusack Music. I just designed the damn things.

Categories
DIY Effects guitar

Museum of Lost Effects:
Interfax Harmonic Percolator

Few guitar pedals can rival the cult cachet of the Harmonic Percolator, a singularly ugly distortion stompbox produced in minuscule numbers in the early ’70s by Interfax, a small company based in Milwaukee, Wisconsin. And guess what? They sound ugly too, though they’re ugly in a cool and useful way.

They don't get much rarer — or uglier.
They don’t get much rarer — or uglier. (This is a cosmetically faithful reproduction from Theremaniacs.)

I’ve been wanting to write about these for years, but was hindered by the fact that I don’t have access to one. No one does! Well, except the pedal’s best-known user, producer/guitarist Steve Albini. (Steve has posted several popular YouTube videos in which he sings the praises of the original and evaluates it against modern clones.)

But I revisited the idea recently when Christian Magee, who runs Tube Depot, sent me a couple of old 2N404A transistors from a stash he recently acquired. This rare PNP germanium transistor appeared in the original, along with an NPN 2N3565 (also rare, but not as ridiculously rare as the 2N404A). Yes—this pedal uses both a positive-ground germanium transistor and a negative-ground silicon transistor in the same circuit. (Another Fuzz Face/Tone Bender clone, this ain’t!)

I whipped up several variants:

    • a clone using the original parts

 

    • a near-clone using more readily available alternatives

 

    • a Harmonic Jerkulator, an all-silicon/no-diodes variation created by DIY stompbox titan Tim Escobedo

 

    • an experimental version with extra controls

Survey the wreckage:

Post-mortem after the jump.