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Delay blend knob

Started by Lastave, July 07, 2017, 07:17:13 PM

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Lastave

Hello! I am trying to wire a pt2399 based delay with a blend that goes from all delay to dry and am having some trouble. Is this something that can be done with say some of the zero point delays. That's the schematic I am going off of and so far the delay is too quiet when mixed in. I would like to keep the op-amp in the design unlike the pitch pirate type delays.  Any help would be great. Thank you!

Lastave

I have tried adding a transistor buffer and still no luck. Not giving up. Thanks for looking.

mcasemo

**Edited**

So referencing the zero point micro II (2014) schematic you could remove the mix pot and just have that line go straight into C14.

Remove R4 which mixes the dry with wet on the output buffer.

Run a coupling cap (1u?) from pin 1 of IC1 to lug 1 of a B50K pot, this will be the blend Pot.  Lug 3 of this pot will get the signal after C4 (out).  Then the wiper of this pot, lug 2, is your new out.

I probably have this drawn out at home, but i think this would do it.

http://www.madbeanpedals.com/projects/ZeroPoint/ZeroPointMicro2.pdf

Lastave

Thanks! I'll give a go and let you know.

Lastave

Your solution worked great!
Thank you!

mcasemo

Awesome, glad it worked for you!