Short SS A Renner back action

[nelsong at intune88.com]

Jude,
I cannot think of a place to locate a second coil spring (I use the
standard coil spring supplied by Steinway)- if I need more return force I
think I will just build up the spring anchor base on the under side of the
belly rail with thick cow hide as required - or, rather than counter
sinking the coil into the tray I will glue an anchor there.
Or, I suppose that I could locate a coil spring of similar dimensions that
would be just a bit longer and or stronger.

> Gene
>
> In theory, I like the concept of the tray pivoting in the same place as
> the underlever centers, as it minimizes the slide friction of the
> underlevers on the tray. This does however change the leverage of the
> return spring. I too replace the leaf spring at the treble end with a coil
> spring between the alto and tenor, but have found it to be inadequate when
> I relocate the pivot accordingly. Someone (maybe David Love) recommended
> adding a second spring. Where does the second spring go and how does it
> affect the feel of the pedal?
>
> Jude Reveley, RPT
> Absolute Piano Restoration, LLC
> Lowell, Massachusetts
> (978) 323-4545