Well I'll weigh in with Susan again on this one. I do lots of CA treatments and anymore I never use more than 2 oz. Rarely do I have pins needing additional treatment, but if they need it, I just give it to them. If it is an upright there is no need to lay it down again. I usually use Susan's method. I have q-tips handy to mop up any glue that runs down. For heavier duty treatment, pull the pin and squirt some glue in the hole. I have never had that trick not work. It is important to keep in mind that CA must have moisture to set up. On a previously treated block there may be very little residual moisture left. It may require a few days time to see results. In Andrew's case I suspect this may be what he is encountering. Because the block is sealed from previous treatment it won't appear to soak up glue as readily as it did before. Rest assure some glue is going in and it doesn't take much. But it may take quite a bit longer for it to set and see results. If the pin holds it does not need to be any tighter. A tighter pin does not give better tuning stability. My experience is just the opposite. A tighter pin is harder to set and tends to yield greater instability for this reason. I have done bottom side grand treatments, especially on really bad blocks. I haven't noticed enough difference to justify the added work. Now I always treat from the top and I don't have any problems. I figure if there ever comes a piano that the top only application does not work I can always tip it over and do a bottom application. Dean Dean May cell 812.239.3359 PianoRebuilders.com 812.235.5272 Terre Haute IN 47802 -----Original Message----- From: pianotech-bounces@ptg.org [mailto:pianotech-bounces@ptg.org] On Behalf Of Andrew and Rebeca Anderson Sent: Sunday, February 05, 2006 8:11 PM To: Pianotech List Subject: RE : Pinblock CA after Dope? I'll elaborate a little more. It was an upright and I trickled the CA in with a hypodermic syringe while upright. It kept soaking it up but with remonstrances against overdoing it fresh on my memory I figured a "lite" treatment would be fine. It was, for the first four tunings. I had to crack the pins loose to tune them the first time. By the fourth time many were loose again and I broke out the CA glue. It would not take-in to the wood. Tilting the piano may have helped the second time around. My philosophy now is: protect the floor or action and give it as much as it will drink. The glue's cheap and the time involved is not so long. YMMV, Andrew Anderson At 02:58 PM 2/5/2006, you wrote: >Marcel, that's an interesting idea. > >I wonder if one might figure a way to crack the plate bushings >(since they seem to crack easily anyway) to allow the CA access? > >Susan > >At 03:45 PM 2/5/2006 -0500, you wrote: >>Ah... >> >>I've found pianos with tuning pins thighter in the plate bushings than >>in the block. This is a situation that I saw on a Korean grand of about >>15 years ago. How did I find this out, is when I had to replace a >>string, I wanted to replace the pins since it was loose. Well, the >>bushings came out with the pins, and, as soon as the bushings were out >>of the plate, I could feel the pins very loose in the block. This is why >>CA has not worked for me in SOME situations. Whenever there were no >>plate bushings, it worked all the time. >> >>Marcel Carey, RPT >>Sherbrooke, QC >> >> > -----Message d'origine----- >> > De : pianotech-bounces@ptg.org >> > [mailto:pianotech-bounces@ptg.org] De la part de Susan Kline >> > Envoyé : 5 février 2006 15:15 >> > À : Pianotech List >> > Objet : Re: Pinblock CA after Dope? >> > >> > >> > At 02:01 PM 2/5/2006 -0600, you wrote: >> > >I'll have to disagree with Susan here. I've gone 'lite' on CA on a >> > >pin-block and after the fourth tuning it needed more. >> > Problem was it >> > >wouldn't accept more. >> > > >> > >Andrew Anderson >> > >> > Well, I'm open to discussion. It needed more, i.e., some pins >> > got loose again? >> > >> > And you put CA on them where they entered the plate, but they >> > stayed loose? What I'm wondering is how a pin can be loose, >> > but not have the room for CA to enter? It gets into such >> > tight cracks usually. People even talk about clamping a wood >> > joint together and THEN adding the CA. >> > >> > Best, >> > Susan >> > >> > _______________________________________________ >> > Pianotech list info: https://www.moypiano.com/resources/#archives >> > >> >> >>_______________________________________________ >>Pianotech list info: https://www.moypiano.com/resources/#archives > >_______________________________________________ >Pianotech list info: https://www.moypiano.com/resources/#archives _______________________________________________ Pianotech list info: https://www.moypiano.com/resources/#archives
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