loose pin & dead bass questions...

[John Ross]

Your right Clyde.
I read it as being 1 1/2" to 2" crack, behind the laminations. So I took the
laminations as being the pinblock, and the crack was behind it.
Regards,
John M. Ross
jrpiano@win.eastlink.ca
----- Original Message -----
From: "Clyde Hollinger" <cedel@supernet.com>
To: <pianotech@ptg.org>
Sent: Wednesday, January 02, 2002 7:25 PM
Subject: Re: loose pin & dead bass questions...


> John,
>
> I can't tell for sure if you understood Stephen correctly.  He says the
crack is
> about the width of a thin bass string, so perhaps 1/16" or 2mm or so.
>From your
> writing it almost sounds as if you thought the crack itself was up to 1
1/2"
> wide.  That would indeed be a disaster; I never saw a back separation that
big.
>
> As far as the small separation goes, I agree that it should be repaired
before
> the piano is tuned again.  But if the pitchraise and tuning is already
done, is
> there any harm in just leaving well enough alone?  I agree that lowering
the
> pitch right away would be the safest route to go, but I've seen two
separated
> backs of more than a half inch, and in neither case did the plate break
> (surprisingly).
>
> Regards,
> Clyde
>
>
> John Ross wrote:
>
> > I am quite concerned, about the space of 1" to 1 1/2" behind the
pinblock.
> > This could be pinblock separation, and is a disaster, waiting to happen.
In
> > my startout years, I had a plate break from just such a situation.
> > If this is a correct assumption, I would lower the pitch, immediately.
Until
> > the pinblock can be clamped, and epoxies together with bolts completely
> > through to the back.
>
> > From: "Stephen Airy" <stephen_airy@yahoo.com>
> > <snip> ...when I opened the lid on the
> > > Gulbransen, I noticed (I think that's the pinblock on
> > > top cause I saw a few layers of wood that were
> > > different colors near the tuning pins) that there are
> > > a couple cracks in the middle of the top of the
> > > pinblock, and a quite wide one (big enough to stick a
> > > thin bass string through) at the treble end toward the
> > > back.  They were a good inch and a half to two inches
> > > behind the laminations.  Is this anything to be
> > > concerned about, or do pinblock cracks only affect
> > > tuning stability when they're closer to the pins
>
>
>
>