Wampler - Faux Tape Echo

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itkindaworks
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Post by itkindaworks »

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.
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Visualdistortion
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Post by Visualdistortion »

Guts:

Image
I wanna make it
I wanna make it wit chu
(again and again and again)

French... sorry ;)

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Hides-His-Eyes
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Post by Hides-His-Eyes »

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)
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madbean
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Post by madbean »

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.

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salocin
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Post by salocin »

Looks like an OPA2134 to me

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Hides-His-Eyes
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Post by Hides-His-Eyes »

there we go then.

Apparently this pedal does some kind of envelope detection as well?
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tuemmueh
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Post by tuemmueh »

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.

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indyguitarist
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Post by indyguitarist »

Nope, no LFO in it.

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Hides-His-Eyes
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Post by Hides-His-Eyes »

indyguitarist wrote:Nope, no LFO in it.
Then how does the flutter work? :)
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Post by tuemmueh »

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

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

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Post by culturejam »

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.

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Jack Deville
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Post by Jack Deville »

CJ, you are correct.
I'm a "professional."
Buy my products and make me rich.

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Hides-His-Eyes
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Post by Hides-His-Eyes »

What's driving the vactrol if not an LFO? :scratch:
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culturejam
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Post by culturejam »

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

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indyguitarist
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Post by indyguitarist »

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

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indyguitarist
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Post by indyguitarist »

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?

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Scruffie
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Post by Scruffie »

Input Clipping? I'll go and hang my head in shame now :oops: 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?

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Post by Hides-His-Eyes »

Hahahahaha I think I got it.

Feedback loop clipping on the vactrol, hence the LED!
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Post by tuemmueh »

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 ...?!

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Post by Hides-His-Eyes »

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.
Testing, testing, won too fwee

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