Discussion about the Korg PolySix synthesizer

On Sun, 2009-02-22 at 18:41 +0900, Oliver Fairhall wrote:
> BTW, IIRC, these pads are rubber, with a coating of conductive silicon
> or metalised powder adhered to the surface. As the conducting layer
> would only be a surface treatment, I imagine that one could wear it out,
> or accidentally clean it off. Has anyone had experience with this?

Sorry, I think these are actually carbon coated. Forgot that.

-Oli





> 
> On Sat, 2009-02-21 at 23:09 +0000, Andrew Jury wrote:
> > Ha!
> > 
> > Just don't let anyone ever smoke near it! Only joking! I had a very 
> > intermittent Polysix keyboard in a while back and no end of using IPA 
> > would make a great deal of difference to the contacts. I ended up using 
> > this stuff:
> > 
> > http://uk.rs-online.com/web/search/searchBrowseAction.html?
> > method=getProduct&R=2638089
> > 
> > This is, used in the right amounts, seems to be a good solution for 
> > cleaning both the contacts and PCB pads. It's the type of thing you 
> > would normally use on high voltage switch gear and the such like. The 
> > keyboard is now still working about 5 months after it was last 
> > serviced. I think, like you have noted, sometime you just need 
> > something a little stronger than IPA. In this case it is a trade off 
> > between something that works without causing any damage or so strong it 
> > starts dissolving things. 
> > 
> > I wonder if we took a set of these contact pads to a component 
> > manufacturer and asked then to build a replica what the minimum 
> > production run would be to make it a viable task. If we had 10,000 made 
> > I'd bet they would all sell!
> > 
> > Cheers,
> > Andy
> > 
> > 
> > --- In PolySix@yahoogroups.com, "wasteking1" <wasteking1@...> wrote:
> > >
> > > the last time i cleaned my key contacts i used alchohol and a q-tip, 
> > > but the results didnt last and were inconsistant. Some notes 
> > > were 'sluggish',almost had a delay, others had to be hit multiple 
> > > timrs......   So I recently cleaned them again, this time using 
> > LIGHTER 
> > > FLUID  (ronsonal)  and a q-tip. I was very careful not to get the 
> > fluid 
> > > on the laquer of the pc-board, Interestingly, i got a black residue 
> > > from many of the round magnets on the q-tip,(but not all) .  i NEVER 
> > > got any signs of  residue using alchohol. Now the keys work great, 
> > all 
> > > instant contacts, no sluggish response. Perhaps this stronger solvent 
> > > is more effective?  seems that way to me.
> > >
> > 
> > 
> > 
> > 
> > ------------------------------------
> > 
> > PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6Yahoo! Groups Links
> > 
> > 
> > 
> 
> 
> 
> ------------------------------------
> 
> PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6Yahoo! Groups Links
> 
> 
>