Hi David The pictures were taken from the treble side and from the bass side--so the pin at the rear in #2 is the faulty notch which is on the sounding length of the string--and it is *very* clear that the horizontal termination (notch) is different than the vertical termination (pin). At 01:04 PM 4/30/2005 -0400, you wrote: >Don - >I don't think the resolution of the pictures is fine enough to be able to >make a judgement, at least as they appear to me. Also, it's not clear >which direction is front and which rear, however I'm guessing that the top >picture is showing the sounding length. #1 has a definite disparity >between pin contact and bridge edge. #2 is much better. It's hard to >decipher side bearing or pin angle, so I guess, unlike Ron, I do see some >possible causes of tonal problems. > > >Regards, >David Skolnik > > > >At 11:44 PM 4/29/2005 +0000, you wrote: >>Hi Ron, >> >>Here are a couple of photos of the offending pin taken from 180 degrees >>apart. Not sure they are small enough to come directly through. >> >>At 03:46 PM 4/29/2005 -0500, you wrote: >> > >>Or just cutting the notch a bit farther back. There's no performance >> > > >> > > reason I >> > > >> > >>can see that the notch edge has to exactly bisect the pin. >> > > >> > >> >> Is this just another old wives tale then? I was under the impression that >> >> this would lead to a different vertical and horizontal termination--which >> >> would cause the string to ring at 2 discreet frequencies at the same time. >> >> I know of at least one 9 foot where this *is* the case in a low bass >> string >> >> that is poorly notched. Perhaps what I am hearing is nothing to do >> with the >> >> notch? >> > >> >That's what I was told too, from when I started back when, to the >> >present day. The problem is, that just doesn't hold up to even >> >casual inspection. Go look at new pianos in the exhibition hall at >> >the convention this year. You'll see some that have notches cut back >> >so far the bridge pin in entirely in the notch cut - but the strings >> >aren't wild. That doesn't fit the explanation. Why? The notch looks >> >exactly right, but the false beat is still there. That doesn't fit >> >the explanation. Why? Now you find wild strings in the field, and >> >stop the false beat temporarily by back bracing the pin with a >> >screwdriver. The relationship between the notch and the pin didn't >> >change, but the beat stopped. That doesn't fit the explanation. Why? >> >Now you try to move a string up a bridge pin and discover how >> >difficult it is to do that. To get the false beat by the old >> >explanation, the string would have to slither up and down the string >> >easily. It doesn't. That doesn't fit the explanation. Why? Seating a >> >string sometimes clears up a false beat temporarily. Seating the >> >string didn't change the relationship between the notch and the pin, >> >so why did the beat stop? That doesn't fit the old explanation. Why? >> >Now go back and read the 43,000 words written on the "why" in the >> >last week or so (with plenty more of the same for some years back), >> >and take another look at that early explanation of false beats. Then >> >ask yourself ... why? >> > >> >I doubt if what you're hearing in that string has much of anything >> >to do with the notch. Without seeing and hearing it, I'd be more >> >inclined to suspect a longitudinal first. What have you tried in the >> >way of diagnostics? >> > >> >Ron N >> >_______________________________________________ >> >pianotech list info: https://www.moypiano.com/resources/#archives >> > >> > >> >-- >> >No virus found in this incoming message. >> >Checked by AVG Anti-Virus. >> >Version: 7.0.308 / Virus Database: 266.11.0 - Release Date: 4/29/2005 >> > >> > >> >> >> >> >>Regards, >>Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. >>Non calor sed umor est qui nobis incommodat >> >>mailto:pianotuna@yahoo.com http://us.geocities.com/drpt1948/ >> >>3004 Grant Rd. REGINA, SK, S4S 5G7 >>306-352-3620 or 1-888-29t-uner >> >>_______________________________________________ >>pianotech list info: https://www.moypiano.com/resources/#archives > > >_______________________________________________ >pianotech list info: https://www.moypiano.com/resources/#archives > > >-- >No virus found in this incoming message. >Checked by AVG Anti-Virus. >Version: 7.0.308 / Virus Database: 266.11.0 - Release Date: 4/29/2005 > > Regards, Don Rose, B.Mus., A.M.U.S., A.MUS., R.P.T. Non calor sed umor est qui nobis incommodat mailto:pianotuna@yahoo.com http://us.geocities.com/drpt1948/ 3004 Grant Rd. REGINA, SK, S4S 5G7 306-352-3620 or 1-888-29t-uner
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