R.G.´s Fake Fender/Brownface/Vibratone Layout here

[slideman82]

Let's see if I can say this right.  "Probably older" would be "probablemente mas viejo"?

Yes, you're right! About Moroco Mole and Secret Squirrel ... that's Cartoon Network business...

Ni bien lo hagas andar, deci que tal suena. Se supone es un tremolo, pero si
hace un poco de phasing se pondria interesante.

[markm]

Let's see if I can say this right.  "Probably older" would be "probablemente mas viejo"?

Yes, you're right! About Moroco Mole and Secret Squirrel ... that's Cartoon Network business...

Ni bien lo hagas andar, deci que tal suena. Se supone es un tremolo, pero si
hace un poco de phasing se pondria interesante.

Google;

Neither do go well, deci such sounds. It assumes is a tremolo, but if
  It is a bit of phasing pondria interesting.

[slideman82]

Let's see if I can say this right.  "Probably older" would be "probablemente mas viejo"?

Yes, you're right! About Moroco Mole and Secret Squirrel ... that's Cartoon Network business...

Ni bien lo hagas andar, deci que tal suena. Se supone es un tremolo, pero si
hace un poco de phasing se pondria interesante.

Google;

Neither do go well, deci such sounds. It assumes is a tremolo, but if
  It is a bit of phasing pondria interesting.

That stands for:

Told us how does it sounds once you finished building it. It is supposed to be a tremolo, but if it makes some phasing, it would become interesting

[markm]

Let's see if I can say this right.  "Probably older" would be "probablemente mas viejo"?

Yes, you're right! About Moroco Mole and Secret Squirrel ... that's Cartoon Network business...

Ni bien lo hagas andar, deci que tal suena. Se supone es un tremolo, pero si
hace un poco de phasing se pondria interesante.

Google;

Neither do go well, deci such sounds. It assumes is a tremolo, but if
  It is a bit of phasing pondria interesting.

That stands for:

Told us how does it sounds once you finished building it. It is supposed to be a tremolo, but if it makes some phasing, it would become interesting

Wow!
Google works great huh?!
Here's a look at the populated VibraTone PCB;

[R.G.]

I liked the opamp version better.

In general, JFETs are simply too variable to rely on.

[Morocotopo]

I liked the opamp version better.

   

And now you tell us.... 

Anyway, here´s a more clear image for etching, and with a scale:


Morocotopo

[John Lyons]

I liked the opamp version better.

In general, JFETs are simply too variable to rely on.

RG, so your reasoning is based on the consistency of op amps?
Did you build either...have any sound comments in difference between the two?

John

[B Tremblay]

I liked the opamp version better.

In general, JFETs are simply too variable to rely on.

Meaning the one you posted on March 8?  Is there a layout floating around for that version?

[markm]

I liked the opamp version better.

In general, JFETs are simply too variable to rely on.

Meaning the one you posted on March 8?  Is there a layout floating around for that version?

I've been working on that.

[markm]

Here's a look at both circuits;



It is a bit smaller but not drastically as I had anticipated when I was initially contacted about this. 
The 1uF Cap on the lower RH side will indicate what I mean by "component fit problem".
I just don't want to see someone etch a PCB for this and have the project be a disappointment because of this.

[alfafalfa]

Here is a sample from a real brownface vibrato ( = tremelo) 
Does it come close to it ?


http://www.esnips.com/doc/5b4b00f5-48bb-4962-86d7-69737efe7f2f/Real-Brownface-harmonic-vibrato

I heard the sample but would like to hear others before I start building it.

My Tremulous Lune sounds very good too but is of course not a harmonic vibrato.

Alf

[R.G.]

RG, so your reasoning is based on the consistency of op amps?

Yes.

Did you build either...

I breadboarded both.

have any sound comments in difference between the two?

The opamp version still uses JFETs for modulation, so there is still some variation. Mainly, there is plenty of gain and you can just trim up the output if you don't like it. That's not always true with JFETs.

I consider the all-JFET version to be a tinkerer's version, or perhaps what a boutique place would turn out to say how it sidestepped ugly opamp sound. It's going to need messed with to get the levels right, JFETs selected, and so on. You can't do that stuff economically on more than a one-at-a-time basis. I consider the opamp version to be the industrial version - what you want if you want it to work first time, every time.

That being said, you could get situations where the residual JFET distortion sounds nice, and might prefer that slight distortion.

[B Tremblay]

Did you build either...

I breadboarded both.

Not to derail the topic, but I'm curious to find out what happened to be the most recent circuit you've built.

[John Lyons]

Thanks for the Observations R.G.

Alfafalfa, that clip sounds really nice, hope the Vibra tone sounds like that!!

John

[R.G.]

I get this feeling that there's about to be a largish number of boutique pedals emulating the old Fender vibrato.   

[David]

I get this feeling that there's about to be a largish number of boutique pedals emulating the old Fender vibrato.   

Not if this thread gets moved to Members Only real quick...