Dumb Wah Question...

[Paul Marossy]

Were the very original Vox V847 and CryBaby circuits identical? I read about this somewhere, but I forgot exactly what I read and where I found it...  :oops:

[Paul Marossy]

Ah, c'mon, doesn't anyone know the answer to this?!  
IIRC, they are, but I was wanting verification on that...

[vanhansen]

I've heard the same thing.  If it's indeed the case, then there has to be some difference here and there, like maybe the inductor and voicing.  Now you got me curious.  

[Paul Marossy]

I'm sure that the actual inductors used are probably different - stack of dimes, Fasel, TDK5103, etc. - but the values in terms of mH should be roughly the same. I am wondering more about the actual resistors/caps. Some schematics of the "original CryBaby" show a pair of 0.01uF caps at the pot and some show 0.22uF caps. I believe that the 0.22uF caps version is the "original original" version, and it would apply to the Vox V847 and the first CryBabys.

[vanhansen]

All the Dunlop ones I've seen have had two .001uf caps at the pot except for the Hendrix model, which has a .22uf and a .022uf.  However, I did find this schematic for the Mister Crybaby:

http://www.fortunecity.com/tinpan/humperdinck/223/mrcry.gif

The GCB-95 has two .22uf caps at the pot, I know that, which is the same as the Vox.

[Paul Marossy]

The GCB-95 has two .22uf caps at the pot

Actually, I think it's 0.001uF caps in the GCB-95. I'll have to check mine again.

Anyhow, I said 0.01uF caps at the pot in the reply above, but I meant to say 0.001uF caps at the pot...  :oops:

[AL]

Hey Paul,

Phillip has some VOX Clyde McCoy info - with pics/schematic etc - at his site.

http://fuzzcentral.tripod.com/

And there are some wah pictures here - maybe it will be of some help?

http://members.chello.nl/~t.heertjes/Wah%20wah.html

AL

[nightingale]

Hello,
From my experience of modding wahs [about 10 or so] i have noticed that the Vox V847, and the 80's crybaby wahs..  revision D are nearly exactly the same. except i have noticed that some of the the dunlops have an SI diode in the very upper right hand corner of the board?

This might be the site to check out: http://homepage.ntlworld.com/s.castledine/greenfuz/wah.html

I am not tech enough to tell you about the different voicing of the inductors or anything like that.. I'm sure if you email Stuart he will know.. plus he is a super nice guy..

hope this helps,

[Paul Marossy]

From my experience of modding wahs [about 10 or so] i have noticed that the Vox V847, and the 80's crybaby wahs.. revision D are nearly exactly the same. except i have noticed that some of the the dunlops have an SI diode in the very upper right hand corner of the board?

This seems to confirm what I was thinking. I bet the diode is something Dunlop added as a small improvement to the circuit...

[Paul Marossy]

OK, this is the page that I remembered reading a while ago. There is some discussion about the inductors and components used in the various Vox, Thomas Organ, JEN & Dunlop wahs. Interesting read for all you wah lovers.  :wink:

http://www.analogman.com/kraft.htm