Heat - its pros and the obvious "con"

Michael Gamble michael@gambles.fsnet.co.uk
Sun, 18 Jan 2004 18:25:26 -0000


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Hello List
Heat in all its forms has many effects in the piano world - both pro- =
and con- . Obvious that too much heat in a room with a piano in it will =
have devastating results. Take Old Folks Homes for example. etc. But =
controlled heat whether it be by gas torch (I have a nice mini one in my =
Harpsichord kit) or soldering iron can be a wonderful boon. All those =
jack-button screws which always break off when regulating old pianos - =
and likewise those dolly-tops for adjusting the touch in the old upright =
are prone to seizure frome rust. Take your soldering iron and apply it =
to the screw or wire and after a few moments.... magic takes over. Then =
there's the other issue of centre pins being loose in the action part =
which is supposed to be gripping the pin. NOT the flange bushings!!! If =
you remove the pin, and with a very thin piece of wire, having first =
dipped it into a bowl of water,  run it through the over-size hole =
making it moist within. Next take your soldering iron, to which you have =
attached a piece of this piano string, and run the hole through! =
Sizzzzle! it goes - and the looseness goes with it. You can even then =
use the same size centre-pin as came out - always supposing the bushings =
are not too tight! Screws in general respond to the heat treatment. =
There's few things worse than breaking off half a head from a slotted =
screw head deep down in the action. Another old "Organ Builder's Tip" - =
Before trying to remove an old screw, apply a TIGHTENING force to it. He =
maintained that the fibres of the wood remember the direction the screw =
was last turning in. He may have something there!
TTFN
Regards from darkest Sussex-on-Sea
Michael G (UK)
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