I don't agree that this proves it. The reason being, that simply letting down the tension to add the aliquots fixes, at least temporarily, the problem. I've done it multiple times in the shop testing this, letting down the tension completely, then bringing it up with no change to the system. Rendering is improved significantly by this simple tension release.
The problem is that it is impossible to make a change to the system, changing only one aspect, without screwing with the system enough to make the results ambiguous.
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Jim Ialeggio
grandpianosolutions.com
Shirley, MA
978 425-9026
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Original Message:
Sent: 10-28-2020 18:45
From: Jon Page
Subject: Ticking agraffes
I have proven that the cloth is the culprit by installing Counter Bearing Aliquots (CBA). I had been thinking about them for a while and when I started to tune an incorrigible S&S S, I stopped the exercise in futility. I went home and made a bunch of CBA's and went back and installed them. Ultra severe ratcheting was gone. It went from being the most difficult piano to tune and requiring restringing to the most pleasant piano to tune.
Whenever I have ratcheting on tenor c/b felt and CBL does not alleviate it, CBA to the rescue! I've proved it time and time again. You can see in the photo that the wire no longer is being pressed into the felt (incredible amount of friction).
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Regards,
Jon Page
mailto:jonpage@comcast.net
http://www.pianocapecod.com
Original Message:
Sent: 10-28-2020 17:42
From: Jim Ialeggio
Subject: Ticking agraffes
I don't buy it...evidence please
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Jim Ialeggio
grandpianosolutions.com
Shirley, MA
978 425-9026
Original Message:
Sent: 10-28-2020 16:10
From: Peter Grey
Subject: Ticking agraffes
It is a common misconception that the ticking is at the agraffe. It is 99.9% in the wire sticking to the counterbearing cloth. Lubricate that with CBL and your troubles will be over.
Edit: Clarification...the tremendous pressure of the string into the cloth (over time) causes the cloth to take on a mirror image of the not-so-perfect underside of the wire. It wants to stay put until you apply enough force to break it free (in one direction or the other)..."tick". Lubrication provides enough slip to stop this pattern. Under some circumstances more than one application may be necessary. Lube the agraffe too.
Pwg
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Peter Grey
Stratham NH
603-686-2395
pianodoctor57@gmail.com
Original Message:
Sent: 10-28-2020 14:05
From: Willem Blees
Subject: Ticking agraffes
Joe
My experience with ticking at the agraff is that the string has a notch or nick in it. What you want to do is get the notch away from the agraff. I do this by releasing the tension of one side of the string by turning the pin at least half turn. Then take up the slack on the other side of the string.
Obviously if there is a lot of rust on the string, especially at the hitch pin, this will not work without the risk of breaking the string. Then the only option is to replace the string.
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Willem "Wim" Blees, RPT
Mililani, HI 96789
Original Message:
Sent: 10-28-2020 11:11
From: Joe Wiencek
Subject: Ticking agraffes
What causes agraffes to tick when changing string tension? I used to see it mostly with agraffes that were bronzed or highly lacquered, but recently have encountered it in a few fairly young Yamahas. As far as I can tell, Yamaha agraffes have no lacquer, and are certainly not bronzed.
Joe Wiencek