[CAUT] New Renner underlever system

[Ken Zahringer]

Hey, Jim,

It is my understanding that the spring tension should be measured with the
lever horizontal (parallel to the keybed) and the post tilted back.  At
least, that¹s the way I¹ve always done it.  I think that, in this instance,
consistency and precision are more important than the exact measurement you
use.  Have you had any complaints?

Regards,
Ken Z.


On 5/6/08 9:27 AM, "Jim Busby" <jim_busby at byu.edu> wrote:

> List,
>  
> When you adjust the springs (for grams) in the Renner underlever system
> how/where do you take the measurement? I¹ve installed about a dozen of these
> and realized maybe I haven¹t been doing it correctly. Here¹s the dilemma;
>  
> Of course the spring increases resistance as you go upwards. When you measure
> the # 1 lever as it¹s parallel to the keybed the grams read 30. Lower it
> slightly below (10 degrees?) parallel and it reads 26. Raise it slightly above
> level and it¹s 33. Renner asks for 29 low ­ 32 high. Is there a ³best² way to
> do this or have I been OK to just do them all at the same place, i.e.
> parallel, or level to the keybed?
>  
> Thanks,
> Jim Busby BYU

-- 
Ken Zahringer, RPT
University of Missouri
School of Music

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