Yamaha CS80

To make a long message short:

Does anybody have a photo of a dismanteled ribbon, by chance?

JH.



--- In yamahacs80@yahoogroups.com, "dark_november2000" <jhaible@...> 
wrote:
>
> On my CS-80, the Ribbon is half-working, and I wonder if I should 
do 
> something about it or just leave it as it is.
> 
> The felt is in perfect condition; the spring/wire is only there on 
> the right 2/3 of the ribbon; the left 1/3 is missing.
> The Ribbon works on the right side, but I can't bend the pitch down 
> to the sub-audio range, because the reduced travel.
> 
> I try to find out what options I have.
> I could transplant the (perfect) ribbon of my CS-60 to the CS-80, 
of 
> course. But I hesitate to do this, because I don't want to such an 
> atrocious thing to my CS-60, *and* I don't even like the "feel" of 
> the original Ribbon very much (my finger feels sore after a single 
> full-range slide!), so I'd rather find a DIY solution for my CS-80, 
> which I can taylor to my needs.
> 
> But I'd like to really know what's going on, and have a plan about 
> what to do, before I ruin the appearance of that CS-80's Ribbon's 
> look with its perfect felt.
> 
> BTW: How can the wire / spring be broken, and 1/3 be missing, with 
> the felt perfectly intact ?!
> 
> I know the whole Ribbon apparatus works like a potentiometer, where 
> the wiper is normally lifted off the resistive sheet. What I'm not 
> sure about: What is the resistive part: The wire/spring, or 
something 
> underneath this?
> 
> (a) Spring is just a piece of metal - beneath the sheet is a long 
> carbon (or whatever) track.
> 
> or 
> 
> (b)Beneath th espring there is just a metal conductor, and the 
spring 
> itself is the resistance.
> 
> I tend to believe it's (a); or is it (b) ?
> 
> JH.
>