Yamaha Jumping Jacks

[Marcel Carey]

Hi Rick,

How do you lower tension on a coil type (jack) springs? I can't figure
this out. 

Marcel

> -----Message d'origine-----
> De : pianotech-bounces@ptg.org 
> [mailto:pianotech-bounces@ptg.org] De la part de Ric Brekne
> Envoyé : 5 novembre 2005 18:47
> À : pianotech
> Objet : Yamaha Jumping Jacks
> 
> 
> Hi Marcel
> 
> You just have to take them out, lower there tension (or use shorter 
> springs if you like) and put them in again. Sounds like more 
> work then 
> it really is.  Action on the bench, bridle straps unhooked 
> and perhaps 
> an hour doing the job. At least thats the way I do it.  I 
> never found a 
> tool that let you do this with the springs in place.
> 
> With good jack center pining, you dont need very much spring 
> tension at 
> all. Certainly not more then the hammer butt can easily push  
> (via the 
> jack top) out of the way as neccessary.
> 
> Cheers
> RicB
> 
> Marcel Carey wrote:
> 
> Were you talking about butt springs or really jack springs. 
> If you were talking about jack springs, how do you regulate 
> them? I'm trying hard to figure out a way to do this, but it 
> doesn't come to me. Could you explain please.
> 
> Thanks,
> 
> Marcel Carey
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