Coil tapping

[Kenneth W. Burton]

	Richard,
	I saw Isaac Sadigursky demonstrate this a few years ago. He found
that the coils were wound so that after the wire left the becket, it
covered the hole on the other side. So he used a soft metal punch to lower
it (and the whole coil) so that only half of the hole was covered. This
aligned the coil much better and, presumably, more stable. What was
shocking was, how much the pitch dropped with this simple operation.

	Ken Burton "Doctor Piano" Calgary Alberta

On Tue, 21 Apr 1998, Richard Moody wrote:

> 
> As not unusual, I think I am missing something here.  Coil tapping.  OK, I
> give up what is coil tapping?   Tapping with what?  I know how to "lift"
> coils, and I know about snugging the becket bend with plyer tips wraped
> with masking tape, and I have  tool I made from a screw driver with the
> last 3/16" of the tip bent 90° that works better than a coil lifter in
> tight places.  But I don't tap with those, I use a T handle and loosen the
> tension, then lift.  
> 
> Richard Wonders
> ----------
> > From: Marvin McDonald <pianomarv@earthlink.net>
> > To: pianotech@ptg.org
> > Subject: Re: Coil tapping
> > Date: Monday, April 20, 1998 10:04 PM
> > 
> > Jim Coleman, Sr. wrote:
> > 
> > > To All:
> > >
> > > Coil tapping is usually taken care of at the factory. All good
> rebuilders
> > > do this routinely because they know that this will save them several
> > > rough tunings. The technician in the field should not have to do any
> > > additional coil tapping on well made pianos.
> > >
> > > I have a 25 year old Baldwin SF10. I lightly tapped two pin coils.
> Nothing
> > > changed pitchwise. Perhaps there might be some change on a very new
> piano
> > > but I don't have one available just now.
> > >
> > > Jim Coleman, Sr.
> > 
> > Jim,
> We almost always find that we have to tap the coils in
> the
> > Samicks,  Wurlitzers,  and Young Chang but only an occasional Baldwin.
> > Mostly in the Grands not so much in the verticals.  This is after they
> have
> > been uncrated.  You would be surprised at the difference in the tuning
> after
> > the coils have been tapped.  I have had the piano fall as much as 70 to
> 80
> > cents flat.  Once they're done and brought back up to pitch they are
> > considerably more stable.
> > 
> > Marvin McDonald, Jr.
> > 
> > >
>