OH MY GOODNESS! I do hope it was rather obvious I was channeling Parent Teacher Association...... Oh boy - egg on my face! I'm sooooooo sorry - didn't mean to disparage anyone or any association. :-( Terry Farrell On Oct 31, 2012, at 11:33 AM, Jurgen Goering wrote: > Terry, I think the PTA in question is the (British) Piano Tuners Association. They hold conventions similar to the PTG, if somewhat smaller. > > The secondary spring in the upright action is a repetition spring which allows for a very fast repetition. The same system was used in some North American brands such as Bell (Guelph) > Jurgen Goering > Piano Forte > www.pianofortesupply.com > > ...................................... > Terry wrote: > Those conferences are a waste of time - totally useless. Unless of course you really value accessibility to cookies and brownies! You're certainly NOT going to learn a darn thing about pianos at them. And I'm really quite surprised that those books would be available there...... > > ....And what do those springs do? Simply add more spring in the same manner as the more common coil jack spring? > Terry Farrell > > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://www.moypiano.com/ptg/pianotech.php/attachments/20121031/1a1dca25/attachment.htm>
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