Yamaha GH1

Stan Kroeker stan@pianoexperts.mb.ca
Thu, 09 Mar 2000 21:09:09 -0600


Dear fellow techies,

Patient:		Yamaha GH1, 14 yrs old.

Condition:	Treble bridge delaminating from soundboard and soundboard
delaminating from rib #2 & 3 (approx. C5 - G6).  Downbearing barely
detectable at all points along bridges.

Symptoms:		None really!  Tone is relatively even throughout the scale,
with good sustain.  No dead spots, buzzes or rattles.

I presented the client with the following options:

1.	Do nothing.  She enjoys the piano and apart from the obvious untoward
appearance, the piano sounds pretty much the way a GH1 normally sounds.

2.	Reduce tension across the scale and remove top 3 octaves of strings,
use various wedging, clamping, screwing, gluing and or sorcery
techniques to reunite the delaminated portions of
bridge/soundboard/ribs.  The worry here is that this may result in a net
reduction in the already barely detectable downbearing.

3.	Put newfound soundboard replacement savvy (re: Brandon
University/Bolduc soundboard seminar) into practice and slide a new
board into place.

Anyone ever see this condition on a Yamaha piano before?  Anything to
add to the above options?

Best regards to all!

Stan Kroeker
Registered Piano Technician


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