[pianotech] How long do unisons hold?

[wimblees at aol.com]

This subject was probably addressed somewhere in the past, but I'd be interested in any/all responses to this question:
 
How long do unisons hold (after a tuning)?
 
I realize it depends on the piano & the tuner... and the season, pin's torque, etc...  but I'm looking for a general rule of thumb.
 
Thanks...   Bill Fritz, St Louis




Bill

I suppose next you're going to ask how long a piece of string is. There are way too many variables to answer that questions. I've had unisons go out as I tune them, on top quality grand piano with a good pin block, and I've had unisons hold for three years on 25 year old spinet. 

I presume you're trying to justify to a customer why a piano went out of tune after a year. Whenever a customer asks that question, I look at my watch. 

Wim 



-----Original Message-----
From: pianofritz50 at aol.com
To: pianotech at ptg.org
Sent: Mon, Mar 8, 2010 5:17 pm
Subject: [pianotech] How long do unisons hold?


This subject was probably addressed somewhere in the past, but I'd be interested in any/all responses to this question:
 
How long do unisons hold (after a tuning)?
 
I realize it depends on the piano & the tuner... and the season, pin's torque, etc...  but I'm looking for a general rule of thumb.
 
Thanks...   Bill Fritz, St Louis




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