Tools, Tones and Toys for Guitarists
I came across the schematic for this while looking through RunOffGroove.com. It’s an interesting mashup of Tim Escobedo’s Idiot Wah and the LFO section from the EA Tremolo to produce a faux phaser effect, and apparently works very well at higher speeds.
The Script version of the Phase 90 is probably the holy grail of phase shifters and was the first effect released by MXR in 1973. It’s probably most famous for helping create Eddie Van Halen’s brown sound on the first 2 Van Halen albums. It was designed before dual op amps were really affordable, so … Read more
I’ve seen a lot of different PCB layouts online for this effect, but all of them had at least one jumper on the board. Jumpers aren’t the end of the world, but I know for me, if I’m going to go to all the trouble of etching a PCB, I don’t want to mess with … Read more
John did a great version of this using vactrols but I wanted a version using simple LDRs so it was available to build for the maximum number of people. I would have preferred to have done this with a single LED with all 6 LDRs surrounding it, but it’s too awkward to do neatly with … Read more
I was going to just add this to the bottom of the Phase 90 post, but on reflection thought it better to start a new one to keep discussion about this build in one place. A few people have requested a layout for the Phase 100 and I thought this could be a happy medium … Read more
I can’t find any information on this one in terms of marketing spiel, but it should be obvious what it’s based on :o)
A few people have requested this so I thought I’d better do it. This one includes the Script mod on a switch so you can choose either mode. Don’t forget that you really need to match the JFETs for this. You may get lucky with an unmatched set but the better the match the better … Read more
Not the most compact layout (as expected with most phasers) but should fit comfortably in a 125B mounted sideways, and maybe even a 1590B if someone has the patience. One thing I will say is that until this is verified I wouldn’t recommend it being built by anyone who may not be prepared to do … Read more
This is a great sounding phaser so I thought I’d still do it even though it probably doesn’t fit with my philosophy of when I would and wouldn’t use vero. Similar in some ways to the Phase 90 but I haven’t seen a layout for this one and so decided it would be a good … Read more
Now Miro has verified the original, here’s a modded version of the Phase 45 and offering a few useful addition such as external Bias and a Mix control, Phase 45 / Univibe 10:1 Ratio switch and a Rate LED. The switch is 2 position 4PDT but you could also split it and use 2 x … Read more