[pianotech] help please

[Dean May]

>>On removing the old pin block, they discovered that the C/A had not
penetrated to any extent, into the pin block 

 

I'm not convinced that the CA actually "needs" to penetrate to the block.
I've come to believe that in many cases the extra gripping supplied by CA
application comes from the saturated bushing itself. In my application I
therefore strive to make sure all the endgrain of the bushing gets a nice
saturation in addition to filling up any gap at the base of the pin. The
latter is still done in the hopes that some will get down to the block. But
I'm finding that saturated bushings seem to improve the friction. 

 

Dean

Dean W May                        (812) 235-5272 voice and text

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From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of John Ross
Sent: Friday, November 11, 2011 11:26 AM
To: pianotech at ptg.org
Subject: Re: [pianotech] help please

 

I know of a grand piano that had the C/A treatment done.

It didn't work, so the person decided to have the pin block replaced.

. I just heard about this last week.

It was not a piano that I had worked on.

I had done a treatment on a same brand grand, and when I went back a year
later, some were still not holding, so I applied more C/A, and did the
tuning.

There was no extra charge for the additional application.

I have not heard back, so I am assuming that it is now ok. Mind you, I never
heard back the first time, and wouldn't have known, but for the fact I was
tuning again.

i always tell people to call me, if it doesn't seem to be working. Since
they don't call, I am assuming that the 'fix' worked.

When in doubt, I suppose, removal of a tuning pin to check for penetration,
might be a good idea.

Also it might be preferable to do the application of the C/A, when the house
is at its driest, in January or February.

Doing it in the height of Summer, might not work due to the higher moisture
content of the block.

John Ross

Windsor, Nova Scotia.

On 11-11-2011, at 11:12 AM, David Love wrote:

 

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