3xPT2399 Reverb

[theengine2r]

This is my built of reverb module out of 3xpt2399 based on schematic lying around in the web with few mod, and it's still not perfect and need some more adjustment in the decay length. So far, this is what I got:

[knutolai]

Very interested in this. I'm guessing this is based on the BTDR-2? I wonder how the circuit for the "Short", "Medium" and "Long" versions differ. 

[theengine2r]

It's based on the BTDR-1, the traced shcematic is lying around at the russian forum 
..Actually the decay is either controlled by the VCO pin or the feedback pin of the pt2399 

[knutolai]

decay is either controlled by the VCO pin or the feedback pin of the pt2399

Reverb length controlled by the VCO (voltage controlled oscillator)? that sounds odd. And where is the feedback pin on the chip? I smell a misunderstanding

Could you post a schematic for the circuit you based this on? I've seen several different BTDR schematics

[ElectricDruid]

decay is either controlled by the VCO pin or the feedback pin of the pt2399

Reverb length controlled by the VCO (voltage controlled oscillator)? that sounds odd. And where is the feedback pin on the chip? I smell a misunderstanding

Could you post a schematic for the circuit you based this on? I've seen several different BTDR schematics

I'm guessing theengine2ri means that how long the reverb tail is depends on both how long the delay is (current out of the VCO pin) and the amount of feedback (number of repeats). So it makes sense to me. There's no "feedback pin" though, that's for sure.

HTH,
Tom