I think it's fair to say that you should not attempt this unless you are pretty confident with your builds. The Earthquaker Devices The Depths, is their take on the Uni-Vibe.
The schematic can be found here, on PedalPCB in the build doc.
Add this board to the Disaster Transport Junior to convert to the Disaster Transport.
Increasing the 470n cap will provide a slower LFO
Bit of a classic guitar effect - the MXR Phase 90.
Electrosmash has an excellent reference that covers all things Phase 90, including the schematic https://www.electrosmash.com/mxr-phase90.
JFETS can be pesky, so make sure you match them as best as possible and buy from reputable suppliers.
The script switch is strictly optional. It's one of those things that if you like a setting, you probably won't ever change.
I don't know much about the origins of this one, as PedalPCB don't seem to have listed any information on it (at least that I can find anyway).
The Pendulum is a Harmonic Tremolo, meaning the signal is split in two paths, each with either a high or low pass filter; they're modulated separately and then summed back together for an interesting effect - not your average tremolo.
Link to schematic via the build document located here
Lower speed rate mod: Replace the C50K pot with a C100k pot for a lower rate OR increase the value of the 4.7u capacitor. Increasing the cap will reduce the max speed, which is probably not a problem for most people.
Here are the filter cutoffs for each side of the trem - keep in mind as one increases in level, the other decreases. The output will certainly not look like this at any given time.
An excellent optical tremolo from Forrest Whitesides, AKA Culturejam, based on the Tremulous Lune.
Project files can be found here https://forrestwhitesides.com/shoot-the-moon-tremolo/ be sure to check out the rest of his blog.
The Bigfoot FX Magnavibe is something different in a world of tremolos; it's a Magnatone guitar amp style vibrato style effect.
Slow and subtle works best for me, as it adds interest to the sound without being over the top. You can get a lovely shimmer happening. Plenty of discussion in the usual forums on what LDR and LED combo to use.
For those that like a regular-size vero, there are plenty of other layouts out there, and I'll probably get around to one a bit later.
The Grand Orbiter Phase Machine is a four-stage OTA phaser, with options for vibrato or phasing (a bit like a Univibe).
Not exactly a small board, but not too much to take on either. MLC caps might be a good idea for some of the 1uf caps to save space.
Currently unverified. I have reviewed the schematic a couple of times, and two errors have been found and corrected, but still... it's a huge board. What could go wrong, right?
A classic phaser from the mid-seventies - the Musitronics Mu-Tron Phasor II. It has the same six-stage phaser as the Bi-Phase, with less happening in the oscillator section.
This is the hardest layout I have ever done and took some time to finish and check... including some time wasted after I started using a layout with errors in the oscillator section, which was very annoying.
Being a six-stage phaser using DIY vactrols - what could possibly go wrong? Unverified at present / build at your peril.
This should just fit in a Hammond 1590BB enclosure (landscape), The dual rail power supply will need to be done on a separate board.
I have not wired as per the original, as it was not true-bypass, and it has a relatively low input impedance of 390k. If you really want to wire it up as the original, just check an old schematic, and you should be able to modify a layout to accomplish this.
