Schematic heavy questioning (Simple PT2399 delay and Triple Splashback)

Most synth signals are mono. Most synth cables are mono.

The 1/4" jacks Sam uses are the same as or very similar to ones available at Tayda; they’re stereo, but Tayda doesn’t have any good, cheap, board mountable 1/4" mono jacks. You can use the stereo jacks and just leave the sleeve terminals unconnected and they work as mono jacks, and in the rare instances you need a stereo jack, well, you have a few dozen of them. So that’s what a lot of us use.

On the 3.5 mm side Tayda doesn’t have a stereo board mounted vertical jack, so you’d use the mono one, and if you need a stereo jack you get it elsewhere or use a panel mount or horizontal board mount jack.

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understood :slight_smile:

bhbhbhbkj

Hello !
I need some help with a project.
I’m working on a really simple pt2399 delay. Basically, I’ve removed every filters. Self oscillation could make some really noisy and weird sound, and I feed him with two 40106 oscillator.
It works as intended on my breadboard, but it’s impossible to get the same results on stripboard… The delay won’t self oscillate, I’m unable to get infinite feedback.
I’ve try everything I could, it’s getting me crazy.
Could someone have look please ?

To make it simple, I’m only focusing on the delay right now. Even without audio in, I’m able to make it self-oscillate (on breadboard).
Here the schematic :

Here is the breadboard :

The stripboard :


And a video : https://youtube.com/shorts/0N6q7LmCH04?feature=share

I’ve tried a lot of different resitors and potentiometers, as I was getting crazy I even directly soldered the IC without socket to see if it could make a difference.
Any feedback would be appreciated.
Cheers
Robin

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The first thing I would do is pass a cutter or knife blade between each line of the stripboard (then a small brush stroke to clean) in order to eliminate any possible risk of a short between 2 lines

maybe some suspicious points here

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Thank you Dud,
I did a check but no improvement so far.
I’ll try to mess with R7 and R8 resistors tomorrow, even if on breadboard it works like a charm with those values.
I also found a circuit very similar to mine : DIY Noise Generator - YouTube
I will have a look and let you know

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