Poly-61 & Polysix - dead key problem

[adie]

I have disassembled some keys frome my poly-61 and I noticed that conductive material is separating from rubber membrane and this cause contact problems (dead keys).

I'm thinkig of buying ultra-thin copper strips, cut and glue them on the rubber membrane.

Do you have any other suggestions how to fix this c**p?

[chipaudette]

LA Synth Co now sells replacement contact strips for several old synths of this era. Very nice, very easy. Worked great for my Mono/Poly (which uses the same type of keybed as the Polysix...I can't speak for the Poly-61).

http://synthhacker.blogspot.com/2016/02 ... opoly.html

Chip

[adamstan]

Poly61 also uses this keyboard.

[garranimal]

Sometimes dust and debris gets in there.

Sometimes the membrane strip is slightly out of position.

LA Synth Co now sells replacement contact strips for several old synths of this era. Very nice, very easy.

This is the best long term option.

A graphite pencil works in a pinch, but is not a long term fix like replacing the membranes.

The original conductive pads have a very specific ohms resistance. Anything with ohms too low, like copper films or silver conductive pens, will cause key-on bouncing. That's a nasty double-triggering/stuttering of notes.

[HideawayStudio]

Have a word with Bob at Sounddoctorin - he sells kits made up of tiny carbon loaded pucks for repairing this style of keyboard. The same type of contacts are also found in the Juno 6/60/106 series and can be troublesome.

http://sounddoctorin.com/address.htm