This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment Dale Erwin wrote: Could you share how it is you're measuring 1.5 degrees of bearing on the = bass and with what. If the rear string length was 8 inches( possible on = a D) 8 Times .026=3D.208 or (1.5 degrees) of distance bearing . = Considering this bass bridge has no cantilever I don't mind seeing this = at the top end of the bridge but I'd like to see .05 degrres in the mono = section........................ Dale, All measurements referred to so far were from the strung piano. = Individual strings were removed and thread/gap measurements were taken. = I was conservative in the bass and subtracted for the twisted part of = the string riding on the hump. Note # 3 showed 1.3 deg, note # 10 = showed 1.7 deg, and note # 19 showed 1.3 deg. Inverse tangent of = (gap/rear length). Did you mean to write .5 deg in stead of .05 ? Just for giggles I = checked one of the previously measured tenor bridge strings in the = middle of the overstrung section after the bass strings were off. (The = following day) It came up from .06 deg to .5 deg. Greg Newell wrote: I re-read your original post below and I still come to the same = conclusion. It sounds as though you're somewhat accomplished in = rebuilding so I'm not sure I understand your hesitation in recapping. If = the original pins are loose and you don't intend to replace with = oversize but you are going through the trouble of pulling the plate and = then subsequent re-stringing then .... why not? = .............................. If I could do something with epoxy in a few hours and save all that = expense. It will get new pins. I am not an accomplished rebuilder or = expert woodworker. I have done dozens of restringings and several board = shimming internal restorations with doweled in new blocks. I haven't = done any in shop belly work for almost a year. Am doing mostly actions = now. At one time I was hot to try bridge capping but I don't think this = is the right time for me. The piano will go to another shop if that is = the decision. It has been a lot of dues paid to get to where I am right = now. It has kind of been a relief that the constant acquisition of = tools has slowed and I have been busy doing things I am good at. I'm = reluctant to take on the big learning curve again. It is tempting = though. I am handy with chisels and planes and japanese saws and reach = for them first before power tools. I used to cut down key # 88 with a = bandsaw, now I pare it with a chisel just for the pleasure of it. Ron Nossaman wrote: But it's not being condemned, it's being restrung even though it sounded = ok=20 before? Is the damaged cap the reason for the restringing? And if so, = why=20 the reluctance to replace it? If not, why is it being restrung? The piano is long overdue for restringing. It has never been restrung. = It is starting to shed treble strings. Capo needs to be reshaped. No = one noticed the cap. It does not sound good in the treble. I thought I = was catching a whiff of that old " If it doesn't have X amount of crown = it isn't worth working on". That was why I said I was not going to = condemn the piano. I was trying to find out if any one had done the = kind of bridge top resurfacing that I am imagining. I have an = obligation to try to repair economically before replacement. =20 >I'm anticipating tight new bridge pins are going to contribute to tonal = >improvement up higher. Why, considering the condition of the cap and resulting bearing = measurements? The pins come out easily. I thought the bearing was ok in that part of = the piano. (I'm not an expert, I'm soliciting an opinion from you = rebuilder types)=20 Everybody, One thing I have learned already is to inspect every piano in the = field if possible. I hate these kind of surprises. Forgive my lack of = protocol knowledge on this kind of message board if I'm creating strange = posts. I guess we have to be careful not to take each other out of = context with all this cutting and pasting. I attempted to quantify the condition of the grooves now that the = strings are off. Either it doesn't look as bad as I thought or I'm = getting used to it. Maybe they are swelling up a bit. Humidity is up. = I held a straight edge on the edge of the bridge and slid a needle under = until it stopped. It measured between .025" and .030" in tenor and low = capo. High capo was .020" to .025". Actually that is about as bad as I = imagined, the strings were about 2/3 into the top. I have no idea what = "normal" wear is because I have never thought about this before. = Mitigating factor : the wood at the edge that the ruler was on is a = little bit puffy. Is this too far to sand/plane down? Could the duplexes be ground = down a bit if so? This might be my last gasp here. Does anyone know = of anyone who has attempted to resurface a top? I guess this is mostly = for my own interest since I would only do it if it were a known = procedure that worked. Like epoxying pins is now a known procedure. I = seem to remember it used to be controversial. I just had another thought that might not offend those who thought = any buildup of epoxy in the groove would fail. What about swelling the = top a little, then planing, then renotching, then pins in w/ epoxy = and saturating notches and top. Any amount the grooves swelled up would = then be saturated and not built up. (Wood Epoxy Saturation Technique = anyone?) Cheers, Steve Bellieu ----- Original Message -----=20 From: Erwinspiano@aol.com=20 To: pianotech@ptg.org=20 Sent: Wednesday, December 18, 2002 6:04 PM Subject: Re: Bridgetop Extravaganza Revisited In a message dated 12/18/2002 4:03:28 PM Pacific Standard Time, = sbellieu@mindspring.com writes: Subj: Re: Bridgetop Extravaganza Revisited=20 Date: 12/18/2002 4:03:28 PM Pacific Standard Time From: sbellieu@mindspring.com Reply-to: pianotech@ptg.org To: pianotech@ptg.org Sent from the Internet=20 Steve Could you share how it is you're measuring 1.5 degrees of = bearing on the bass and with what. If the rear string length was 8 = inches( possible on a D) 8 Times .026=3D.208 or (1.5 degrees) of = distance bearing . Considering this bass bridge has no cantilever I = don't mind seeing this at the top end of the bridge but I'd like to see = .05 degrres in the mono section. That being said I've seen D basses set = up with more than that that sounded great and ones with nominal bearing = or none that sounded somewhat weak. Where's the beef? What's really there has or will come to light with the strings off = no doubt. Dale Erwin ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/8f/02/7a/fa/attachment.htm ---------------------- multipart/alternative attachment--
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