Here’s a really nice delay designed by Nocentelli.
You can find the original thread on FSB here.
This is his description of the circuit:
Here’s a variation on the deep blue delay; two PT2399 chips and a current mirror delay pot give around 2200ms delay,
although beyond 700ms gets pretty lo-fi. There are two points where a
momentary SPST can be used: Either to briefly connect the input to the delay input on select phrases (dub mode), or to bypass the repeats feedback
resistor for self-oscillation on demand.
