Spirit box noise.

[JohnnyPunk]

Im getting a weird hiss? Or just some ambient noise on this spirit box when turning up the depth and just doesn't sound right. Not sure what the hell is going on. Any ideas?? Should I have used film box capacitors instead of ceramic ones? Is it some ground issue?

 

[szukalski]

Try another PT2399. The through-hole ones are not consistent in terms of performance.

 

[JohnnyPunk]

Try another PT2399. The through-hole ones are not consistent in terms of performance.

So. Different socket or solder these right to the board? . Ya got a link to the ones yer taking about?

 

[KR Sound]

Keep the socket, just replace the IC. You’ll find some noisy crappy 2399s around.

 

[JohnnyPunk]

Keep the socket, just replace the IC. You’ll find some noisy crappy 2399s around.

What about the smaller delay units. The square ones. Is there the same problem with them?

 

[eh là bas ma]

I'd check the soldering first, make sure everything looks good, then i'd try a new 2399 from a reliable supplier.

If the problem remains, i'd check the soldering again, and try to locate the issue with an audio-probe. Probing the signal path progressively, following schematics, to find where the noise starts in the circuit.

You could also post some voltage readings, as described here :

DEBUGGING - What to do when it doesn't work

DEBUGGING - What to do when it doesn't work

www.diystompboxes.com

 

[paulcalypse]

Dealing with the same thing. I probed the circuit in many spots to narrow down the source of the noise. I ended up pulling the Belton Brick and wiring it up on the breadboard alone to hear the same hissy noise present in the circuit. I think its coming from the brick.

I swapped it (in both configurations) with another brick on hand (the M) and hear the same noise. I bought both bricks from Stompbox Parts this year.

I wonder if it could be power supply related. That would be the last thing to check for me.

Is the BTDR-2 just inherently noisy??