Neovibe in a wah shell? Pot question?

Started by boogietube, October 27, 2006, 10:13:45 PM

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boogietube

So - after hearing some recent clips, I have to build a neovibe. I really would like to put it in a wah shell. Where can I find an appropriate pot for this operation? I know that some have put an easyvibe in a shell, but I think that it only sounds close- not quite there. And the pot for that is standard.
Any info or modifications or someone willing to sell such a thing would be appreciated.
Thanks!
Pedals Built- Morley ABC Box, Fultone A/B Box, DIY Stompboxes True Bypass box, GGG Drop in Wah, AMZ Mosfet Boost, ROG Flipster, ROG Tonemender, Tonepad Big Muff Pi.
On the bench:  Rebote 2.5,  Dr Boogie, TS808

sfr

I threw my entire Neovibe into a wah shell - I used an old crybaby shell for it.   I modified the bracket a slight bit, filing it down to thin it a bit (so the shorter throat on a standard pot would fit) and filling it with a curved piece of metal and J B Weld (so the pot fit snugly and wasn't just held on by stressed washers.)   

Originally, I just ended up using a dual audio taper pot from Radio Shack - (the really long shafts on Radio Shack pot's really help) I simply filed a flat spot in the pot shaft to fit the crybaby gear on there.  Some thread lock would be helpful - you want to make sure that you're not quite maxing out the rotation on the pot when the foot pedal goes down, that's the biggest help, but the cheap metal of those radio shack pot threads is very easy to strip before the nut is quite as tight as you'd like. 

Since I've had problems with Radio Shacks pots going out on me before, and putting a pot in a rocker shell means it's getting a lot of use, I started looking for a replacement.  I didn't look very hard - ideally, conductive plastic pots would be best, if you're going with a direct solution.  I ended up using the single pot speed control from over at Geofex -  ( http://geofex.com/circuits/ldrlfo.htm )  It's taken me a little tweaking to get the sweep working how I wanted with this - although part of that turned out that I hadn't really gotten the 'vibe tuned in quite right with the trimpot on the bulb.  Now it's just where I want it, but I need to switch to a 10K linear pot - the vactrol in the circuit from Geofex has a taper rather like an audio taper with a linear pot - with an audio pot it's just *extra* steep.   (Somewhere between the workbench and the pedal, I ended up putting an audio pot inside by accident.)

Rather than ramble on more about the details of that circuit at Geofex, I'll just say try using the advanced search, and searching for "Neovibe" with my handle ( sfr ) as the author - there's at least one thread where I've asked questions about that single-pot LFO circuit, and R.G. has chimed up with a lot of handy info that has helped me get it working.
sent from my orbital space station.

petemoore

Convention creates following, following creates convention.

sfr

Quote from: petemoore on October 28, 2006, 02:03:15 AM
  What value pot does it use?

The neovibe itself uses a 100K dual Audio pot - reverse audio taper for a boxed setup, audio taper for an expression pedal/wah enclosure setup (crybaby-style shells turn the pot backwards) The single-gang-pot setup using a vactrol from the Geofex article I mentioned above uses a 10K pot.  Linear seems the best in conjunction with that add-on circuit.
sent from my orbital space station.