Dark Rift Delay

[BuddytheReow]

Not sure if this should go here or in the troubleshooting threads. I just finished up a dark rift delay and it works. However, the repeats aren’t very loud even with the mix pot at max. I’ll hear one or maybe two repeats and that’s it. Has anyone had experience like this? Is this the nature of the circuit? I’ll start swapping out the pt2399 this weekend when I have a few moments. Any input would be appreciated.

 

[MichaelW]

I'll hook mine up and mess around with it in the morning. I tend to use delay at very low mix rate anyway, not sure if I actually cranked it or not but I'll let you know.

 

[MichaelW]

For you @BuddytheReow I was willing to fire up my rig and play some guitar before finishing my first cup of coffee

I am not having the issue you are having with the repeats. On my pedal the repeats can be set with the "Repeats" pot from fairly tight (one or two repeats) to full on self oscillation at max. The volume of the repeats can be as loud as the original signal controlled by the "mix" pot.

Sounds like something's not quite right with your PT2399 or something else.

 

[mybud]

@BuddytheReow: I can second @MichaelW's diagnosis. Mine also self-oscillates and does a plethora of plangent palpitating repeats. Perhaps the 2399 is a dud, worth a try. Hope it works out for ya.

 

[BuddytheReow]

Thanks guys for the input. I’ve gotta hang out with the in laws today so hopefully the wife will understand that I need some “me time” this afternoon. Will swap out the 2399 then.

 

[szukalski]

Try bypassing the pot with alligator clips or wire. Maybe the pot itself is dodgy.

 

[BuddytheReow]

Try bypassing the pot with alligator clips or wire. Maybe the pot itself is dodgy.

I’ll try that, but I know the pot works as intended. I can get 100% dry signal when turned ccw. I gues my issue is that the repeats are too quiet and decay very quickly

 

[nate433]

I’ll try that, but I know the pot works as intended. I can get 100% dry signal when turned ccw. I gues my issue is that the repeats are too quiet and decay very quickly

I wish I could remember which resistor/cap it was. But I had this happen to me as well. I ended up accidently using like a 100n cap instead of the required 100p. Very similar symptoms

 

[BuddytheReow]

I'll have to check my caps again when I get a chance. Thanks!

 

[nate433]

I'll have to check my caps again when I get a chance. Thanks!

Looking at the board again. I want to say it was one of the 1u MLCC near the PT2399 I put 1n instead (or vice versa)

 

[ADAOCE]

Looking at the board again. I want to say it was one of the 1u MLCC near the PT2399 I put 1n instead (or vice versa)

This is a common mistake and likely source of error.

 

[BuddytheReow]

Yep. That was it. I put a 1u instead of a 1n. It was a semi-painless process to swap it out. I can now get it self oscillate which was what I wanted.

 

[nate433]

Yep. That was it. I put a 1u instead of a 1n. It was a semi-painless process to swap it out. I can now get it self oscillate which was what I wanted.

tight

 

[Chuck D. Bones]

Visual inspection to the rescue once again.