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Here's a Wampler Faux Tape Echo. Main feature that sets it apart from the other PT2399 delays is a flutter sound that is more random.

Guts:

Companded PT2399 delay with vactrol LFOing for 'warble'?

I assume it's a compander... Can't read it (the 8 pin that isn't the JRC)

I don't think so....there's a 4580D and an OPA2304 from what I can tell. My guess is that the 4580 handles in/out stages and the other is for the LFO driving the Vactrol, maybe. Looks like a very well thought out design. I like the layout.

Looks like an OPA2134 to me

there we go then.

Apparently this pedal does some kind of envelope detection as well?

Hides-His-Eyes wrote:there we go then.

Apparently this pedal does some kind of envelope detection as well?

I'm interested, how you came to this asumption. I thought, like madbean and you in your further post, that one dual op-amp (most likely the OPA) would be for in-/output buffers and the JRC is used for lfo.

Nope, no LFO in it.

indyguitarist wrote:Nope, no LFO in it.

Then how does the flutter work?

Allright, now you got my full attention, Brian ...

The detuning sounds a little bit like the clari(not). Which uses also a PT2399. Hmmm...

Hides-His-Eyes wrote:

indyguitarist wrote:Nope, no LFO in it.

Then how does the flutter work?

I'm guessing that's what the vactrol is for.

CJ, you are correct.

What's driving the vactrol if not an LFO?

Hides-His-Eyes wrote:What's driving the vactrol if not an LFO?

Again, I assume it's some sort of envelope follower setup. Like in an auto-wah, but surely setup a bit differently for the flutter application.

much, much simpler than what most of you are probably assuming... Jack knows I believe

ok, I can't take it. it's super easy. if picking harder makes it 'flutter' more and it's using a vactrol... how would you do that?

Input Clipping? I'll go and hang my head in shame now I can't guess if it's not an Envelope...

Edit: Meant Peak Detector there, not clipping really, so it's dependant on pick strength to drive it.
So the LED part makes the LDR control the Delay to make it flutter, anywhere close?

Hahahahaha I think I got it.

Feedback loop clipping on the vactrol, hence the LED!

You mean the red led + vactrol-led as the clipping diodes in an op-amp feedbackloop and the vactrol-ldr is controling the modulation depth?! But there is no distorted sound. What am i missing ...?!

tuemmueh wrote:You mean the red led + vactrol-led as the clipping diodes in an op-amp feedbackloop and the vactrol-ldr is controling the modulation depth?! But there is no distorted sound. What am i missing ...?!

What's the typical input gain of an overdrive though, 100?

Can't see that this would have an input gain anywhere near that. So maybe I wasn't right after all, maybe there's a seperate op-amp circuit for the clipping diodes.