The blog needs more modulation, so here's the classic EHX Small Clone chorus. Made famous by Kurt Cobain, the Small Clone has a wide ra...

Not sure I missed doing this one ages ago, but better late than never. The Bassballs is a classic envelope filter that's been a staple o...

Got a request to redo the LPB-1 with the pot board mounted. Can't say I'm opposed and it only took about 5 min to layout. :) Easy fi...

The XB-70 is a clone of the Captain's personal '77(?) Guild Foxy Lady, which were built by Electro Harmonix and generally very simil...

Here's the Hot Tubes overdrive from Electro Harmonix. It's based around a 4049 hex inverter chip (like a Red Llama) with a dual op a...

There have been a few different iterations of the Soul Preacher. This one follows the version that isn't based around an OTA chip (much ...

Here's the Glove from EHX's nano series. Essentially, it's an OCD with a switchable charge pump. On originals the voltage switch...

It's Fuzz Friday once again and this week we have the Satisfaction Fuzz from Electro Harmonix. It's essentially a Jordan Bosstone wi...

Let's wrap up this 1590a week with one of the mightiest fuzzes of all time–the Big Muff. For this one, I've labeled all the componen...

Around the same time that the EHX Big Muff was first released in 1969, Mike Matthews also released the Muff Fuzz. It was unrelated to the BM...

I got a request for a layout of the Big Muff that could be used to build the Triangle, Rams Head, Green Russian, or NYC versions. While it s...

Haven't done a Big Muff layout in a while. This is the Triangle version again and is pretty much the same layout as before, but I change...

The EHX Germanium OD offers 60s overdrive tones using a combination of germanium and silicon transistors (all PNP). All 3 pots control the v...

The LPB-1 was the first effect made by Mike Matthews and Electro Harmonix. Like many other effects at the time, it was housed in a small box...

Here's the original EHX Pulsar trem from the 70s (not to be confused with the modern Stereo Pulsar EHX manufactures today). It features ...

The Dr. Quack is Jack Orman's improvement on the EHX Dr. Q envelope filter. Basically, there's an added input buffer to increase the...

In the late 70s, Mike Matthews and EHX took the Big Muff on a detour from the traditional 4 transistor circuit in favor an IC-based circuit....

I know, this is the 3rd different BMP layout I've done, but this is the one I'm the most happy with. It will easily fit in a 1590B, ...

With the exception of the IC BMP ('77, '78) you can theoretically build just about any version of the Big Muff on any other version...

This one was a request. It's another layout for Jordan BossTone, but with onboard pots. Because of the onboard pots I was able to add an...