Sympathetic ringing

[Newton Hunt]

Hi, Jerry,

Check that the dampers are not resting on the backs of the keys.  Place
your fingers very lightly on a key and lift and drop the damper.  If you
can feel a bump at the end of the key there is not enough clearance. 
The key should go down 1/8" or the hammer half way to the string when
the key and damper lever come togather.

You can get some ringers from the entire duplex, from the middle section
to the high treble.  All the duplex needs to be muted to test if they
are the source.  I have used fresh black electrical tape because it does
not leave adheasive behind when removed.  I carry silly putty to use for
this purpose while tuning.

IF the sounds continue then mute the open treble strings.  This is not
much you can do about them if they sing so work with the customer during
the entire process of elemation.

If it is one or two duplex singing you can use some thin felt to mute
the offenders or you can smear some vasaline on the offenders.  It is
invisable and can be easily removed.

Let me know how this works out.

	Newton