[CAUT] restrung D

[Daniel Gurnee]

John, et  al,

I found that epoxies become extremely fluid when heated  and flow very 
freely between the pin and bridge.  The temperature is critical but 
when applied to the top of the bridge pin will cause the epoxy, 
previously applied epoxy to the side of the pin opposite from the 
string, will show an extremely viscus nature which will suck into the 
joining of the pin a d bridge.

The results vary with the various epoxies some of which setup with 
greater rigidity and the pins do not need to be removed.

Daniel Gurnee, RPT, HSU



On Friday, April 6, 2007, at 12:10 PM, John Ross wrote:

> The epoxy would mean removing, and replacing the bridge pins.
> Possibly C/A might be worth a try first. Easier.
> John M. Ross
> Windsor, Nova Scotia, Canada
> jrpiano at win.eastlink.ca
> ----- Original Message ----- From: "John Minor" <jminor at uiuc.edu>
> To: "caut" <caut at ptg.org>
> Sent: Friday, April 06, 2007 3:15 PM
> Subject: [CAUT] restrung D
>
>
>> Wim,
>>
>> I've had similar problems with a restrung B. I suspect part of the 
>> problem is due to the high volume of air flowing around the piano 
>> from the air handler fan speed. Fresh air from outside is required to 
>> keep air healthy. My situation worsened after the building had fans 
>> upgraded and outside dampers improved to bring in MORE fresh air.
>>
>> Another possible cause is loose bridge pins caused by the extremely 
>> dry air in commercial buildings in the winter. I'm planning on doing 
>> an experiment with epoxy in bridge pins in one section to see if 
>> things improve.
>>
>> Good luck! This can be extremely frustrating! One of my secret fears 
>> is that people will think I don't tune the piano at all, *OR* that I 
>> do a lousy job!! : (
>>
>> John Minor
>> University of Illinois
>>
>>
>> I
>