Doug, Do you have any pictures of these tacks after you installed them? I think I can imagine what it looks like, but a picture always cinches it for me. -John Parham > -------- Original Message -------- > Subject: [pianotech] Re Green piano bridge repair with carpet tacks > From: Douglas Gregg <classicpianodoc at gmail.com> > Date: Thu, November 11, 2010 11:03 pm > To: pianotech at ptg.org > > > I have had two bridge repairs fail. Granted, in both cases there was a > crack connecting the pins allowing a lot of movement. I used 2 ton > epoxy with one with no filler added. The other was repaired with PC 11 > filled epoxy. However, if I used a filled epoxy again I would use JB > weld that contains iron filings. It would have to be wormed up a bit > to get good penetration. > > My point is (pun intended) that if you use the carpet tacks with the > head removed as steel wedges, it works really slick. You don't even > have to take all the tension off the string. I push the steel wedge > shaped tack in next to the pin with pliers and finish by tapping it in > with a punch until it is flush. If it does not move over enough, use a > second one. It is so tight at that point that you can use any glue you > want or none at all. You have to try it to see how neatly it works. It > is a lot less messy and you don't have to tip the piano on its back > either. I little CA glue would be fine and would wick in around the > tack if you are worried about it moving. > > This is how I have repaired several bridges and it takes about 10 > minutes. Can't beat that. Five minutes to put in the tacks and 5 > minutes for CA or 5 minute epoxy. A few minutes to retune. > > Doug Gregg > Classic Piano Doc > Southold, NY 11971
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