Yamaha CS80

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.

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.
>

If all fails, drop a line to Mr. Spong, who has new springs custom made.


Peace,
J


On 01-02-2008 15:40, "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.
> 
>  
>     




[Non-text portions of this message have been removed]

Thanks!
Excuse my ignorance.
But what is so special about the springs that they need to be custom-made, 
and where do I find Mr. Spong?

JH.

> If all fails, drop a line to Mr. Spong, who has new springs custom made.


Peace,
J


On 01-02-2008 15:40, "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.
>
>
>




[Non-text portions of this message have been removed]




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