My general rule is to not treat an entire pinblock unless many pins are so loose they will not hold pitch, and others are pretty loose. I have always used about 4 oz. of CA to do an entire piano (most of it in the pinblock ;-). I have had pretty good results. The grand I Ca'ed recently I finally tried just a squirt on each pin. Used about 1 oz. total. Total failure. Did not help much at all. So I don't know what the best thing is. Although, I do know that next time I will apply it until it will take no more! Terry Farrell Piano Tuning & Service Tampa, Florida mfarrel2@tampabay.rr.com ----- Original Message ----- From: "Clyde Hollinger" <cedel@supernet.com> To: <pianotech@ptg.org> Sent: Friday, September 22, 2000 7:50 AM Subject: Re: Dopey Tuning > Friends, > > I am still a little stymied on using CA on pinblocks. (Aren't we good at > pounding this subject to death?!) I only recently started doing this and have > done maybe three or four so far. > > I heard someone in a convention mini-technical say you only need three or four > drops; I think he said four. So I applied enough so I could see it wick around > the entire pin. That used about 1/3 bottle and wasn't too successful. > > I also used an entire 2-oz. bottle on an old upright. I just kept going over > the pins until the bottle was empty. That covered all the pins twice and most > of them three times. When I went back to tune the piano a couple weeks later > they were so tight they felt like they would twist off! > > So I know my experience is limited, but it makes me wonder if two or three > bottles really do any more good than one. Is it too much of a good thing? I do > feel that several drops aren't enough, unless the pins weren't all that loose to > begin with. Comments? > > Regards, Clyde > > > > Farrell wrote: > > > I have used CA with good sucess in general. I glued a block in a cheap grand > > (loose AND very jumpy pins) a couple weeks ago and it was my first total > > disaster with CA. A waste of time and glue (and her money). No beneficial > > effect at all. I ended up shimming 28 pins and told her that next time there > > will likely be a few more. Shame, piano was recently restrung. Guess the guy > > (or gal) didn't know tuning pins get loose. > > > > The few other times I sucessfully used CA, I have used 2 or 3 of the 2 oz. > > bottles - I gooped in in until it would not go in any more. Some recent > > posts suggested just a few drops is all that is needed. So this time I used > > less - about 1 oz. total. I wonder if that is why it did not work this time. > > > > Terry Farrell > > Piano Tuning & Service > > Tampa, Florida > > mfarrel2@tampabay.rr.com > > > > ----- Original Message ----- > > From: "Richard Brekne" <Richard.Brekne@grieg.uib.no> > > To: <pianotech@ptg.org> > > Sent: Thursday, September 21, 2000 8:41 AM > > Subject: Re: Dopey Tuning > > > > > Course there is pinblock dope and there is pinblock dope. Actually the old > > Pin > > > tite and similiar products are quite different approaches from CA and > > Epoxy > > > methods and I am not sure the "dope" is the right word for these latter. I > > never > > > had any good results from the old style of dope either and what you > > describe is > > > what I always ended up with.. stopped useing that kinda thing long time > > back > > > now. > > > > > > I have heard some say that applying CA to pinblocks that have been treated > > thus > > > can greatly improve the situation, but CA is something I have very little > > > experience with so I will leave that to others to confirm or deny > > > > > > > > > Farrell wrote: > > > > > > > Well, last night I tuned my first (for sure) pin block doped piano. 1926 > > > > Cable upright - much better than average condition - grandmother bought > > it > > > > new. Bass restrung about 15 years ago. The tuning pin collars were > > black, > > > > and some dark tarry-looking goop was on plate in tuning pin area (likely > > > > doped at time of bass restring). And EVERY pin was REAL MUSHY! A bit > > hard to > > > > tune - seemed like you needed a new hammer technique. It felt like > > someone > > > > put a thin collar of neoprene around each tuning pin. Torque was > > typically > > > > pretty low, likely ranged from 20 to 50 inch-pounds (estimate). It just > > felt > > > > like notes were going to start creeping flat as I was driving home from > > the > > > > job. Is this a problem with doped pinblocks - creeping flat in short > > periods > > > > of time? > > > > > > > > Terry Farrell > > > > Piano Tuning & Service > > > > Tampa, Florida > > > > mfarrel2@tampabay.rr.com > > > > > > -- > > > Richard Brekne > > > RPT, N.P.T.F. > > > Bergen, Norway > > > > > > > > > > > >
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