A New Electric Mistress Clone - With a Dinosaur Theme!

The Electro-Harmonix Electric Mistress is one of the foundation modulation effects pedals released in the 1970's. It has been used by many guitar luminaries over the years, and is a really amazing flanger / chorus pedal. I'd previously built the PCB Guitar Mania version of the board - though it appears that this was a copy of the Madbean Current Lover board as it had many of the same quirks. Madbean has recently released a 2023 revision of the board that adds a volume knob, support for multiple BBD chips, and multi-voltage support (up to 18V). While my previous build was a great pedal, I really wanted to do a fun dinosaur version to add to my Steggo line-up. I'd also gotten requests for an Electric Mistress clone from some friends, and I really wanted to go with a better base PCB than on my original build, so I grabbed a few of the new Madbean boards and got to work!

Dimetrodon Distortion - A Classic Hybrid Distortion Pedal

In my update about a week ago, I included some teasers for upcoming pedals that I had not yet included on the blog. One of these was the Steggo-san Overdrive which I featured a few days ago. In terms of overall appearance, that is still one of my favorite pedals. In terms of sound, today's pedal ranks right up there. The Dimetrodon Distortion combines the classic MXR Distortion+ circuit with the tone stack from a Big Muff Pi creating something of a hybrid pedal. I've worked up a couple of different prototypes of this design so far, and I think I've decided which way I want to go long-term, because if offers me the widest range of options for this particular circuit going forward.

Old School CMOS Overdrive - Cloning the Original EHX Hot Tubes

The 1970s was a time of rapid change and development in the electronics industry. Transistors became increasingly common, and the technology to fabricate them saw revolutionary jumps in density and fabrication. Complementary metal–oxide–semiconductor (CMOS) technologies became increasingly common, and were first applied to guitar fuzz effect pedals to emulate a "tube sound" in 1977. In 1978, Electro-harmonix released their own CMOS-based overdrive pedal, the Hot Tubes. It was only produced in its original form from 1978 to 1981 when EHX ran into financial issues. The pedal was eventually re-released as a "nano" series pedal in 2013 and in a dual pedal with the Crayon as the "Hot Wax" later. These are still in production and only run about $80, so while you can save a couple of bucks building your own, it's not one I'm going to produce in any volume!

PCB Mania No Noise Gate - Dang Useful Utility Pedal!!!

Readers of this blog should be well aware at this point that I'm a fan of high gain distortion and fuzz pedals. I'm also a fan of vintage transistors actually used in those high gain pedals. While you can get some absolutely amazing tones using high-gain distortion effects, you can also get a lot of tones you don't actually want. The most common is a hiss (high or low pitched) or a hum, though there are other unwanted noises that can detract from your sound. Given the prevalence of the issue, it should be unsurprising that there is a solution out there - Noise Gates. Many companies have produced a variety of pedals that essentially act as a high-pass filter - louder tones, i.e. what you actually want to hear, sail through while the softer hiss tones are filtered out. In this entry, I build PCB Mania's No Noise Gate - which is based on the Electroharmonix Noise Gate. The current EHX Silencer pedal is a bit more capable as it includes an effects loop rather than simply acting as a filter.

Updated Pi - Repainting a Friend's Pedal!

Back in September I posted a couple of versions of the Big Muff Pi I'd build using Aion FX's Halo board. One was done in silver with a Pink Floyd inspired font and recreated the circuit of the '73 Gilmour Ram's Head version of the pedal. The other one was done in Russian 4BO green and recreated the Red Army / Civil War circuit. A friend asked me to make up a second Russian style enclosure, so I did and sent it to him. Unfortunately there appears to have been an issue with my primer, as the paint started to flake on arrival which sort of ruined the effect. So he sent it back to me for a redo, and as long as we were doing it again, he wanted a bit of a variation on the theme...

Updating the Electric Mistress - No Send / Receive Loop Mod

Last week I posted an entry detailing my EHX Electric Mistress build based on the PCB Guitar Mania Electric Lover PCB. Overall I was pretty happy with the build, but I had noticed something a little unusual when I began the calibration process. In my first entry I mentioned having to crank the bias trimmer quite a bit to get a good tone (or any tone at all for that matter). On the PCB Guitar Mania Facebook group, another user posted that he was having a similar issue with his build, although his was apparently bad enough to where he couldn't get a reasonable calibration. Fortunately the long-time board users had a fix for him, and since I'd had a similar issue in my base-build, I decided to take a deep breath, pull the PCB out of the enclosure and try the fix on mine as well. 

The Electro-Harmonix Electric Mistress Flanger / Chorus

I'll be completely honest, I'm not a great guitar player at this point. I'm somewhere in the "intermediate" range, but I'm having a huge amount of fun learning not only guitar technique but chasing great sounds. One of the songs I've always loved is Rush's "Natural Science," and the flange effects at the beginning of it really do a lot to set the tone and mood of the piece. While no one seems to have a definitive answer (apart from Alex Lifeson, who apparently hasn't discussed / disclosed what hardware was used), the consensus is that he used an EHX Electric Mistress on the album Permanent Waves - especially on "The Spirit of Radio" (another song I need to learn...). As I'm on a massive pedal-building kick, and given one of my other guitar heroes David Gilmour also used one, I decided to build my own EHX Electric Mistress using PCB Guitar Mania's Electric Lover Flanger PCB.