[pianotech] Diaphragmizing

[Mike Spalding]

Did it look like this?


http://www.woodcraft.com/family.aspx?FamilyID=555&refcode=05INFROO

Lie Nielsen chisel plane.  Wonderful tool.

Mike

Al Guecia/AlliedPianoCraft wrote:
> Thanks for the information Ron. When I worked at Steinway in the 
> Regulating department, we had a nose plane. It was a good size plane 
> with the blade up front with no frame in front. I haven't seen one 
> since. It came in very handy preparing the key bed. Unfortunately it 
> was company property. That would be a great tool for reduce the 
> thickness of the panel  perimeter around the edge. Tried a Google 
> search but could find anything like it.
>
> Al
>
>
>
> --------------------------------------------------
> From: "Ron Nossaman" <rnossaman at cox.net>
> Sent: Sunday, January 25, 2009 6:22 PM
> To: <pianotech at ptg.org>
> Subject: Re: [pianotech] Diaphragmizing
>
>> Al Guecia/AlliedPianoCraft wrote:
>>
>>> <snip> Rebuilding with an existing board, thinning the bass (or
>>> channeling like Overs and Seiler) can be very worthwhile.
>>>
>>> Can you explain how you do that?
>>>
>>> Al
>>
>> Ron O has a photo on the opening page of his website 
>> http://www.overspianos.com.au/ showing the soundboard with a channel 
>> routed around the inner rim in the bass, thinning the panel 
>> perimeter. This is a laminated panel, so tapering it wasn't a 
>> reasonable option. The channel did the trick very nicely.
>>
>> Another approach, on a solid panel, is to plane, chisel, grind, gnaw, 
>> or otherwise reduce the thickness of the panel perimeter around the 
>> edge of the bass, tapering it back to full thickness in the middle. 
>> If you have sufficient back scale length in the bass to make it worth 
>> the trouble (since you already have the plate out), it should help 
>> bass response noticeably. If you have the classic 40mm back scale on 
>> A-0, don't bother.
>>
>> Ron N
>>
>>
>
>