[pianotech] 6th 3rd test

[tnrwim at aol.com]

Brian

Although  the 3rd 6th test is a good one, a better way to tune the bass is to run consecutive 10ths, starting with the first note in the bass, making sure it is beating slightly slower than consecutive thirds in the treble. 

Example

First note in the bass is E3. Count the beats in G3 - B3, down to F3 - A3. The E3 - G# 3 should a little slower. Then check the E3 - G#4 10th. Proceed downwards, with the 10ths getting slower and slower. When you've reach E2 - G#3, play E2 - G#4 17th and continue down the scale. You should be able to hear the 17ths beating, even on poorly scaled pianos. 

Wim




-----Original Message-----
From: AAA Piano Works, LLC <aaapianoworks at frontier.com>
To: pianotech <pianotech at ptg.org>; 'David Lawson' <dlawson at davidlawsonspianos.com.au>
Sent: Sun, Oct 24, 2010 11:04 am
Subject: [pianotech] 6th 3rd test



 
Hello,
 
Just to clarify something, when tuning octaves in the bass, the M6th should beat 1. The same? Or 2.Faster? or 3. Slower? than the m3rd.
 
If C 3 is tuned, then the Eb 2 – C3  beat rate should be ????? compared to C2 to Eb2 beat rate.  C2 is the note to be tuned.
 
Thank you,
 
Brian Doepke
 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Andrew Anderson
Sent: Sunday, October 24, 2010 3:46 PM
To: David Lawson; pianotech at ptg.org
Subject: Re: [pianotech] Regulation mystery

 
Yammies, esp. U-1, are infamous for this.  Lost motion is necessary for them, more if it is dry.

 

Andrew Anderson

 

On Oct 24, 2010, at 3:02 AM, David Lawson wrote:





I regularly service about twenty pianos at a Conservatorium, both uprights and grands. The uprights are mostly Yamaha U1 models about 15 to twenty years old, with a couple of Kawai KS models also. I regulate the lost motion on these instruments so that the capstan holds the wippen so there is no lost motion, however, it is not holding the hammer off the rest. I have just finished the regular maintenance of these this week, and discovered that all but one had increased the height of the capstans to hold the hammers off the hammerest by about 1/4 inch or 6cm. My first reaction was that someone had been at them, turning up the capstan. However, this is not possible as I am the only tech. who attends to these pianos.

So, my question is this: Would the sudden change from drought,(about ten years) to very wet conditions, have brought on this amazing change? I find it difficult to believe that this much change could be brought about by humidity. Let's face it, the metal pin holding the capstan is tight into the rear of the key, which would surely not increase the height by this much with humidity! I checked the back touch on the key-frame, and it seems quite normal.The only piano that did not have this happen to it, had an additional heater in that room, which may give us a clue.

Your thoughts please.

David Lawson Wangaratta Australia


 


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