> -----Original Message----- > From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Al Kossow > via cctalk > Sent: Tuesday, May 04, 2021 9:48 AM > To: cctalk@classiccmp.org > Subject: Re: General Instruments Capacitive Keyboard Encoder > > On 5/4/21 2:33 AM, Paul Birkel via cctalk wrote: > > I'm currently reverse-engineering an AMPEX keyboard that uses capacitive key > > switches. > > did all of the square foil and foam pads disintegrate in it?
It uses individual sprung metal leaves, with the exception of the caps-lock key which has a central LED and around that an annular square foil/pad that is in fine shape. It's all nicely constructed; the case even includes a spray-on metallized surface that is connected via a sprung contact to the cable shield and the switch-body retaining plate. -----
