v-bar/capo repair

[David Love]

I was thinking about Barbara's temporary installation when I posted this-see
me response coming with an attachment.  Sometimes, like Ron mentioned, it's
a matter of getting them tied down until you can get the rest of the tension
on them.  Sometimes, however, the angle of the plate is wrong.  It seems
like some of these bars are held down with a bit of vanish or something to
just give them that bit of stick when dry.  I have also tacked them with a
bit of CA glue.  The thin stuff wicks underneath these bars really easily
even after the strings are on.  Also, the half ovals give you a greater
leeway in terms of the angle of the plate matching the string angle because
the string will contact a larger area over the apex and the force will be
more downward and less sideward if it's not a perfect match-I don't know if
I splained that very well.  When in doubt, pin 'em.

 

David Love
davidlovepianos at comcast.net 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Jeannie Grassi
Sent: Thursday, March 09, 2006 8:20 PM
To: 'Pianotech List'
Subject: RE: v-bar/capo repair

 

That's really helpful, David.  The piano is long gone, but it was slipping
out away from the pins.  The puzzling thing was that there had been a half
round there previously with nothing underneath it.  I don't know why that
stayed in place.  I'll remember this tip for the next time it happens.

jeannie

Jeannie Grassi, RPT
Registered Piano Technician
Island Piano Service
Bainbridge Island, WA
206-842-3721
 <mailto:jcgrassi at earthlink.net> mailto:jcgrassi at earthlink.net

 

  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of David Love
Sent: Thursday, March 09, 2006 8:09 PM
To: 'Pianotech List'
Subject: RE: v-bar/capo repair

 

With the tension on can you tap it back into place and will it stay?  If
not, then the angle of that part of the plate isn't right to hold it in
place with just string pressure.  When installing an entire length in such
situations I usually pin it.  However for your testing purpose you won't
want to do that.  Does it tend to slip toward the tuning pins or away from
them?  If it's toward the tuning pins you might cut a short, thin strip of
wood that you can place between the new brass half round and the old
counterbearing bar to hold it in place.  If it's slipping away from the
tuning pins.I'll have to think about that one.  

 

David Love
davidlovepianos at comcast.net 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Jeannie Grassi
Sent: Thursday, March 09, 2006 7:53 PM
To: 'Pianotech List'
Subject: RE: v-bar/capo repair

 

I had a problem keep a length of brass half round in place. I'm interested
in knowing what people use to make sure it doesn't move.  It was a longer
piece that extended the entire treble area.   It was a slippery little thing
that moved when the tension was brought up to pitch. 

 

jeannie

 

 

Jeannie Grassi, RPT
Registered Piano Technician
Island Piano Service
Bainbridge Island, WA
206-842-3721
 <mailto:jcgrassi at earthlink.net> mailto:jcgrassi at earthlink.net

 

  _____  

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Barbara Richmond
Sent: Thursday, March 09, 2006 1:40 PM
To: Pianotech List
Subject: Re: v-bar/capo repair

 

Hi David,

 

When experimenting duplex length with brass half or oval round, would you,
in this case, place anything on the bottom of the brass to avoid scratching
the plate?   Or isn't it a problem?

 

Thanks,

 

Barbara Richmond

----- Original Message ----- 

From: David Love <mailto:davidlovepianos at comcast.net>  

To: 'Pianotech List' <mailto:pianotech at ptg.org>  

Sent: Tuesday, February 28, 2006 10:25 PM

Subject: RE: v-bar/capo repair

 

Like Ron N. says, I think it's likely it has to do with the front duplex and
you may be able to shorten, detune and increase the deflection angle by
inserting some brass of appropriate dimension-at least you can experiment.
If it turns out that that's the problem, it's not that big a deal to remove
the strings from one section and insert the new counterbearing piece and
then replace the strings (the same ones you took off).  Unhook them from the
tuning pins slip in the brass or whatever and then reattach-if that proves
to be the problem.  I get brass of varying sizes from www.rjleahy.com
<http://www.rjleahy.com/> .  They will cut to a reasonable shipping size.  I
don't know the configuration of this piano but maybe you can send pictures
and some suggestions could be made by various people, I'm sure.  If the
noise disappeared originally by muting the front duplex, it is likely that
there is leakage occurring and that's what you should address.  Shortening
the section and increasing the deflection can do that.  You do want to be
sure that the angle and deflection work together.  The longer the duplex the
greater the deflection angle.  Similarly, a shorter duplex requires smaller
angle. 

 

David Love
davidlovepianos at comcast.net 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20060309/449f6739/attachment-0001.html