Tools, Tones and Toys for Guitarists
Here’s a weird chorus from Valve Wizard based around a PT2399. In Merlin’s own words… Chorus is created by passing the signal through a very short delay line, somewhere between about 8ms and 25ms. The delay time is modulated and the delayed signal is mixed back with the original un-delayed signal. Some feedback (‘repeats’) is … Read more
A little blog update: You may have noticed there wasn’t a post yesterday and that there is one today. Why on a Tuesday and not a Monday? Some big-ish changes are coming to the site in the near future, which (along with a bunch of other small things) is taking up a lot of my … Read more
Here’s Valve Wizard’s take on the PT2399 delay. It’s very similar to most PT2399 delays out there, with a dual op-amp providing input and output buffering. This was designed with the tails function and it uses Valve Wizard’s usual J112 switching. Here’s his original schematic and explanation of the circuit. You can also use a … Read more
Here’s a reverb circuit that doesn’t require a Belton brick–the Equinox II by Valve Wizard. It uses 2, PT2399 delay chips with a pretty standard input/output buffer built around a TL072. The original uses a J112 for switching the tails function, but I’ve simplified that with a just DPDT footswitch. Use one side of the … Read more
Mixing it up and doing Flanger Friday this week. Got a request for this circuit designed by Valve Wizard. It’s unique in that it uses 2, PT2399 delay chips paired with an LFO. It features a buffered bypass, so it’s not a true-bypass effect. I’ve also drawn up daughter boards for the bypass switching (PCB … Read more
Stumbled across this effect while looking for a completely different schematic. It’s a low cost chorus designed by Merlin Blencowe (here’s his schematic for reference), using a PT2399. It generates deep modulation and a very thick warble (here’s a sound clip).