key-frame return spring

[David Ilvedson, RPT]

I take it you are referring to action return spring vs. treble side of the
keyframe?  I would scrap off all the DAG and use nothing but microfine
teflon powder.  DAG has a habit of falling off whenever you are over a white
carpet and is really unnecessary these days...OK maybe bridge tops.  Also
make sure that the spring itself isn't moving!

David I.


From: Mark Cramer <cramer@BrandonU.CA>
To: caut@ptg.org <caut@ptg.org>
Date: Tuesday, November 21, 2000 7:18 PM
Subject: S&S: key-frame return spring


>Hello all,
>
>Today I managed to find the elusive source of shift-pedal squeeks and
groans
>in a B, and with careful effort and attention actually made it worse!
>
>Once I had determined the cause (spring against (wooden) key frame), I
>carefully sanded the side smooth, applied a generous coat of DAG, and
>burnished with a cloth.
>
>It worked instantly, and lasted about 3 minutes!  Once the DAG was well
>burnished, it began to groan as before, but louder!  And now, in addition
to
>the fundamental, there were additional squeeks a major 3rd above and major
>2nd below!?
>
>At a loss, I worked teflon powder into the graphite and with vigorous use,
>the noise has not returned. Tefloning and testing the two contact points of
>the spring seperately helped verify the source, as one "note" of the
>non-musical "interval" disappeared with the first treatment, then the
>remaining two.
>
>I fear this remedy will not last though, so what is your favourite tried &
>true, long-lasting, never-fail, method?
>
>Thanks for your suggestions,
>
>Mark Cramer,
>Brandon University
>
>
>