[pianotech] renner whippen assist springs

Jon Page jonpage at comcast.net
Sat Apr 10 09:26:03 MDT 2010


Tom.
i make new springs with phosphor Bronze wire from Instrument Workshop:
http://www.fortepiano.com/thewireplace/PhosBronze/phosbronze.htm

I made a spring making tool (jpg attached).

I like to make the loop arm 2mm longer so it does not strain at the loop
in the rest position. With a longer spring arm, the difference in tension
between rest and let off is not as great as with the OEM spring.

I have lots of the OEM springs.  Take a ride down... :-)
-- 

Regards,

Jon Page
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