Rhodes Chroma Polaris

> From: Thomas Rizzi [mailto:rizzitech@...] 
> 
> In doing the basic procedure, I noticed the need for the 
> pedal input to be used.
> 
> My question is - is there any differences between my Roland 
> EV-5 control pedal and the one to be used for the Chroma Polaris?

The Chroma pedal is basically a 100K variable resistor between the tip and
sleeve, driven through its full rotation by a rack and pinion. The EV-5, if
you set the Minimum Volume knob CCW and leave the ring disconnected, looks
is a 10K variable resistor between the tip and sleeve, driven through a
fraction of its rotation by a lever and connecting rod. This means you'll
only get a small fraction of the range out of it.

If you had an extra EV-5, you could probably replace the pot with perhaps a
500K one, and get it to work, but you'd have to do some experimenting to
ascertain the optimum value.

-- 

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...

I have a Roland FV-50L that I could use for this task.  then just put a TRS 
cable on it with a 500K Ohm pot on it.
I believe that would be a linear taper pot correct? i don't think that it would 
be an audio taper.
Correct me if I'm wrong
thank you very much for your assistance.
Best regards
Thomas





________________________________

From: Paul D. DeRocco <pderocco@ix.netcom.com>
To: Thomas Rizzi <rizzitech@...>; Polaris list 
<chromapolaris@yahoogroups.com>
Sent: Sun, November 21, 2010 6:21:03 PM
Subject: [chromapolaris] RE: Re; No sound

  
> From: Thomas Rizzi [mailto:rizzitech@yahoo.com] 
> 
> In doing the basic procedure, I noticed the need for the 
> pedal input to be used.
> 
> My question is - is there any differences between my Roland 
> EV-5 control pedal and the one to be used for the Chroma Polaris?

The Chroma pedal is basically a 100K variable resistor between the tip and
sleeve, driven through its full rotation by a rack and pinion. The EV-5, if
you set the Minimum Volume knob CCW and leave the ring disconnected, looks
is a 10K variable resistor between the tip and sleeve, driven through a
fraction of its rotation by a lever and connecting rod. This means you'll
only get a small fraction of the range out of it.

If you had an extra EV-5, you could probably replace the pot with perhaps a
500K one, and get it to work, but you'd have to do some experimenting to
ascertain the optimum value.

-- 

Ciao,               Paul D. DeRocco
Paul                mailto:pderocco@...