[sdiy] Key Lag Improved!

harrybissell harrybissell at prodigy.net
Sat Aug 31 21:55:22 CEST 2002

Hi Joe (et al)

The higher resistance of the rubber is no problem... if the circuit is high impedance

the keys will be a tiny fraction of the total, and speed is unchanged. It might even
help to eliminate key bounce...

Problem is that rubber does not AGE gracefully as does metal...  so the keyboards
will get old and unworkable... not like the old gold plated Organ keyboards that
live just about forever...

H^) harry.

Joe Kramer wrote:

> Hi Friends,
>     First, thanks to everyone for the usual educating and helpful advice--Andrew,
> Byron, Glen, Harry.  The problem, maybe inherent to Yamaha keyboards in general,
> was easier to help that I originally thought.  After reading a SonicState review
> of how a guy fixed the keyboard problems on his DX100, I opened the PSS460.  I
> cleaned the printed circuit contacts under the keys with DEOXIT and--drumroll,
> please--REMOVED THE THE THIN PERFORATED MYLAR STRIP that lay between the circuit
> contacts and the rubber contactor running the length of the keyboard.  It seems
> that this mylar strip is just thick enough that the extra pressure required to
> flex the rubber contact and complete the circuit results in a sensation of lag.
> After reassembly, the keys were easier to play and I was able to keep tighter 8th
> notes at 120bpm.  I would think that the conductive rubber-strip technology is
> problematic anyway, in that there would be quite a bit of resistance, and hence
> lag, compared to a metal contact.  Anyone ever tinker with this on a Yamaha or
> other keyboard?  Thanks again.
> Regards,
> Joe Kramer

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