OldSynths

Aren't the sensors just conductive rubber?

Or, are they piezo?

What does your tech say they are.

Rubber 'does" deterioate.(maybe just needs cleaning)
Piezo does not.(can crack, though)

PAIA made a "VelociTouch" kit way back.
it used one piezo to allow pitch bend and vibrato using keyboard
pressure.  The piezo mounted under the frame of the keyboard.
it generated a voltage from piezo pressure,to modulate a vco/vcf whatever.
it was not a synth module, but rather a stand-alone, wood sided
ac, self-powered stand alone unit---whew!!  long description!!

put the piezo on a chair;  when you rock your butt, U can modulate
a vco or vcf. Would this be "playing by the seat of your pants"?
heh heh

i have data if anyone's interested.

tb22

--- In oldsynths@yahoogroups.com, Simon <simon@a...> wrote:
> My local analogue tech, who owns a CS80 himself, says that the 
> aftertouch sensors on the CS80 will deteriorate over time and need 
> replacement. He thinks that Yamaha threw away all the old parts stock 
> for older keyboards, such as these CS80 sensors. I think he mentioned 
> they were a pyramid shaped rubber sensor underneath the keys.
> 
> Has anyone heard of, or experienced, this degradation in the CS80 
> aftertouch sensors?
> 
> Does anyone know of a source for original or replacement CS80 
> aftertouch sensors?
> 
> Is there anything that could be used as a replacement, or could 
> replacements be made somehow?
> 
> Does anyone have information on how these sensors are 
> constructed...materials used, shape, assembly, etc.?
> 
> 
> Thanks,
> Simon
> Canberra
> AUSTRALIA