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<DIV> <STRONG><EM>Hi Paul </EM></STRONG></DIV>
<DIV><STRONG><EM> I totally get that & I was unclear. If the rear
segment is traveling downhill from the aliquot to the rear bridge
pin because of bridge slope then trying to measure bearing like this
can also be fraught with errors. Or you can take it under advisement &
keep a wary eye on the results. </EM></STRONG></DIV>
<DIV><STRONG><EM> Enclosed is a picture of a bearing gauge I posted
before. With this jig even if the rear string angle travels down to the rear pin
the net over all bearing can still be ascertained. I'm still fiddling with the
information this gives but one thing is for sure, if there is real &
residual bearing in the piano it is easily visible, to you & your
clients.</EM></STRONG></DIV>
<DIV><EM><STRONG>I.e. hold the gauge at the speaking length pins & rock
downwards so the rear touches the aliquot. If bearing is present then a
gap will be evident between the aliquot & the bottom of the gauge. On
a 5 inch string segment yielding a gap of .065 thous (as measured with the gauge
in the picture) reveals that there is about 3/4 of a degree of residual net
bearing. Now this is a new board set up at 1 1/2 degrees. SO I'v squashed
the board 3/4 of a degree. </STRONG></EM></DIV>
<DIV><STRONG><EM> I like this because it's quicker than the Lowell &
more visual. It may not tell you everything but it tells a huge story
quickly. JMHO</EM></STRONG></DIV>
<DIV><STRONG><EM> Frank, you should like this as a quick visual of
deflection.</EM></STRONG></DIV>
<DIV><STRONG><EM></EM></STRONG> </DIV>
<DIV><STRONG><EM> For accurate result the gauge must be held tightly
against the pins on the front section while pivoting. I checked every piano in
the rebuilders gallery in Rochester & all the pianos had significant
bearing that was immediately obvious from the distance the gauge
rocked. & some possessed more than 1 1/2 degrees.
hmmm?</EM></STRONG></DIV>
<DIV><STRONG><EM> Dale Erwin</EM></STRONG></DIV>
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<DIV>Dale:</DIV>
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<DIV>I'm not picturing what you're trying to describe. "The rear foot of the
gauge"? <STRONG>Both feet </STRONG>of the gauge sit on the "duplex" segment
when you're measuring it, just as <STRONG>both feet</STRONG> of the gauge sit
on the speaking length when making that measurement. Are you suggesting that
the "front foot" when measuring the backscale is on the bridge and the rear
foot is off--on the backscale string? This would an incorrect use of the tool,
and fraught with error. After zeroing out the gauge on the bridge top (now
that's a measurement that's fraught with error as well; if anyone assumes that
the bridge top is all in the same plane, then there's a big mistake being
made), the gauge is moved wholly to the front scale in front of the front
bridge pin for a measurement and then wholly to the back scale behind the
rear bridge pin for measurement, and the two combined yield a "net" bearing.
Am I misunderstanding you? As dull-witted as I am, it wouldn't surprise
me.</DIV>
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<DIV>Paul</DIV></FONT></BLOCKQUOTE></DIV>
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