owlexifry
Well-known member
- Build Rating
this is probably one of the most unique sounding PT2399 delays i’ve tried.
I guess a large part of what makes it stand out is the clever filtering design.
IME, it allows this scenario where the repeats / oscillation can build up in a subtle way that feels like a nice warm blanket in the background, rather than chopping your head off like they normally can (at the more extreme settings where things are fun).
this also makes this a perfect delay for putting after a fuzz or distortion.
i grabbed the board last year when effectslayouts had a BF sale, but didn’t really get inspired until @Aleph Null showed up with a MkII version.
one of the updates included a mosfet switch to engage / disengage the wet signal output, allowing for adjustable tails duration with a pot that controls how quickly the mosfet switch drops the output signal to ground.
super cool.
comparing the MkI and MkII schematics, i could see there was a way i could retrofit the mosfet switch circuit to the MkI, and yep, it works:
but tbh, i had so many problems with this build. i ended up reboxing it about 2 or 3 times.
while testing the mosfet switch circuit during the dry-fit stage, i was crudely probing with +9V directly to a 3PDT terminal to confirm the switch action. this arced a few times and i suspect this fried the TL072 that was soldered in the board, cos the whole circuit went dead.
replaced the TL072, and was back in business.
then during testing again, i noticed the feedback was a bit weak, and i could barely get it to oscillate. sad times.
so back out of the enclosure…
the BOM called for a 22K for R8 and so that’s what i put in.
with not enough repeats, I tacked a 6k2 across R8 for ~4.8K to get more feedback signal, but that was too much. then I tried 22k over 22k for 11k, and that was about right.
so i pulled out the 22K and settled on a 12K for R8.
although now, after boxing, it seems to oscillate less than when i was testing it out of the box
really needs a trimpot for R8 I reckon, and i think that's exactly what’s happened for the MkII version.
it’s supposed to go in a 125B in portrait orientation, but i’d been getting inspired by @falco_femoralis ’s awesome landscape builds, so i wanted to see how that would go into a 1590B.
it’s kinda dumb and impractical like this but sometimes its fun to do things differently.
i actually finished this one before the last two build reports, but didn’t get around to recording the demo for a while.
here i’ve got a fuzz face running into the delay, starts off with the volume rolled back for cleans and then goes into full distortion
I guess a large part of what makes it stand out is the clever filtering design.
IME, it allows this scenario where the repeats / oscillation can build up in a subtle way that feels like a nice warm blanket in the background, rather than chopping your head off like they normally can (at the more extreme settings where things are fun).
this also makes this a perfect delay for putting after a fuzz or distortion.
i grabbed the board last year when effectslayouts had a BF sale, but didn’t really get inspired until @Aleph Null showed up with a MkII version.
one of the updates included a mosfet switch to engage / disengage the wet signal output, allowing for adjustable tails duration with a pot that controls how quickly the mosfet switch drops the output signal to ground.
super cool.
comparing the MkI and MkII schematics, i could see there was a way i could retrofit the mosfet switch circuit to the MkI, and yep, it works:
but tbh, i had so many problems with this build. i ended up reboxing it about 2 or 3 times.
while testing the mosfet switch circuit during the dry-fit stage, i was crudely probing with +9V directly to a 3PDT terminal to confirm the switch action. this arced a few times and i suspect this fried the TL072 that was soldered in the board, cos the whole circuit went dead.
replaced the TL072, and was back in business.
then during testing again, i noticed the feedback was a bit weak, and i could barely get it to oscillate. sad times.
so back out of the enclosure…
the BOM called for a 22K for R8 and so that’s what i put in.
with not enough repeats, I tacked a 6k2 across R8 for ~4.8K to get more feedback signal, but that was too much. then I tried 22k over 22k for 11k, and that was about right.
so i pulled out the 22K and settled on a 12K for R8.
although now, after boxing, it seems to oscillate less than when i was testing it out of the box
really needs a trimpot for R8 I reckon, and i think that's exactly what’s happened for the MkII version.
it’s supposed to go in a 125B in portrait orientation, but i’d been getting inspired by @falco_femoralis ’s awesome landscape builds, so i wanted to see how that would go into a 1590B.
it’s kinda dumb and impractical like this but sometimes its fun to do things differently.
i actually finished this one before the last two build reports, but didn’t get around to recording the demo for a while.
here i’ve got a fuzz face running into the delay, starts off with the volume rolled back for cleans and then goes into full distortion
