Yamaha CS80

I use that Pedal without any problems on my CS80.  But I think its silly that the Wah adjusts the volume as well on the CS80, so I don't even use it anymore.
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> To: yamahacs80@yahoogroups.com
> From: david@...
> Date: Thu, 20 Dec 2007 14:08:03 -0800
> Subject: [yamahacs80] Re: CS80 Expression pedal?
> 
> 
> From what I've read, the old expression pedal was the FC-3a, which was
> also used for other synths, like the GS1/2, DX-7, etc. The pedal input
> a voltage on the sleeve (-15v in the CS80) and output a voltage on the
> tip of the plug. It did this with a light bulb / shutter / photocell,
> but there's nothing magic about this. What's kind of weird is that this
> voltage is buffered and used to drive an LED light, which controls the
> signal feeding the main volume knob (all on the PRA board). I don't know
> why the used an LED / photocell as a VCA when there are a billion
> IG00151 VCA chips all over the rest of the keyboard.
> 
> Anyway, Yamaha now sells the FC-7 pedal. It just uses a potentiometer
> (probably with a weird taper to match the old response) instead of a
> light/shutter/photocell. However, the Yamaha manual (
> http://img3.musiciansfriend.com/dbase/pdf/man/m_151552.pdf) says it's
> compatible with the old FC-3a.
> 
> David
> 
> rj krohn wrote:
>> yes, that would be great, gustavo. thanks alot-any leads you could provide(or a diagram would be awesome) would be hugely helpful. i have yet to find anyone who is using a current market expression pedal on a cs-80, so at this point, your lead is my best one! thanks.
>>
>> "Gustavo E.E. Grinóvero"