"restoring" crown with springs

[Ron Lindquist]

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At 01:24 PM 4/22/01 -0400, you wrote:
>In a message dated 4/22/01 3:38:38 AM Central Daylight Time,
>dnereson@dimensional.com writes:
>
>
>>To Carl Meyer:
>>    A long-time technician for the public schools here in Denver has used
>>springs to "restore" the crown in some pianos (mostly studios and old
>>uprights), and with successful results, i.e. better tone, longer sustain,
>>more volume.   He gave a technical at a chapter meeting some years ago, and
>>it would take a while for me to find my notes, but briefly, he used angle
>>brackets fastened to the backposts, automotive valve springs, fender
>>washers, and adjustable bolts to vary the pressure.  I believe the spring /
>>fender washer / bolt assemblies, one fastened to each backpost, pressed
>>directly on the ribs, probably behind the long bridge.   Seems he may have
>>let the tension down first in some cases, or maybe just in the bass, I
>>don't remember, but I could look it up.  Anyhow, the results were quite
>>impressive.  He didn't recommend it for fine pianos, mind you, but to bring
>>some life to an old piano that would otherwise be junked, it was a fairly
>>quick and inexpensive cure.    Sincerely, David Nereson, RPT, Denver
>>
>>
>
>
>This sounds like a good way to restore some life into older pianos, but the
>question remains, is it worth it? Is the time and materials spent to doing
>this process worth the end result? How long lasting is this process?
>
>Willem

Wondering  about loading of sound board-----can't vibrate freely , or 
rather how it was intended. !  Would not waste my time.----I heard of a 
guy-on a grand ,  that jacked up under the Bridge cut a 2x4  and let it sit 
for a time .   Real nice work if you can get it.


R.R.R.
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