MH BB Pinblock

[David Love]

Since the pinblock and plate are attached to the inner rim (in this case the
pinblock is screwed to the inner rim via a couple of plate screws that
penetrate the block down to the rim) all the way to the stretcher why would
you need to attach the pinblock to the stretcher to create case stability.  

David Love
davidlovepianos at comcast.net 
www.davidlovepianos.com

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Farrell
Sent: Saturday, August 02, 2008 1:24 AM
To: Pianotech List
Subject: Re: MH BB Pinblock

I disagree with Ron's recommendation to not glue the pinblock to the 
stretcher. This is a very important step to stabilize the entire case 
structure. You need to glue the stretcher to the pinblock so that the 
stretcher does not fall off. And being that the stretcher is a very heavy 
duty 1 x 3 piece of  poplar (or did some manufacturer actually put a little 
piece of hard maple in there?) on most pianos, it is integral to keeping the

sides of the piano case in place. It's your basic knee-bone is connected to 
the leg-bone relationship - just like the circle of sound - if the pinblock 
is not secured to the stetcher, the stretcher call fall off and then the 
case sides will fall off - or at least rattle a lot - or at least the sound 
will leak out. Maybe the sound that travels through the pinblock "reflects" 
off the stetcher and back into the pinblock and back into the strings.....

And maybe it's WAY too early in the morning. I'm going back to bed...... 
;-)

Terry Farrell

----- Original Message ----- 
From: "Fenton Murray" <fmurray at cruzio.com>

> but
>> not the stretcher (which I see no benefit to), on reassembly.
> Ron,
> Why do you say that?
> Fenton