Keyboards & Conductive Rubber

[Gordon JC Pearce]

Dave Dunfield wrote:

> Several of the keys on this keyboard require excessive pressure to make
> contact - I've tried cleaning the pads, and (gently) the surface of the
> rubber, however it appears that the rubber has increased in resistance.

The pads either wear or "dry out" or something, never worked out which. 
  I talked a mate of mine through repairing some vintage synthesizers 
which use conductive pads for the control panel (Sequential Six-Trak, 
Alesis drum machine and sequencer) by taking the panel apart and 
painting a blob of silver-loaded paint for repairing heated rear windows 
in cars.  The bottle was a couple of pounds from Halfords, and probably 
cheaper in your local independant motor factors.  A tiny bottle lasts 
for ages because you only need a little spot.

Gordon.