damper felt sizes

[Jurgen Goering]

I am preparing to have my own "house brand" of damper felts made for 
Piano Forte Supply.  I can essentially have them cut to my 
specifications, as long as I buy the minimum factory order.  [gulp...]  
  The material I will be using is first-rate horizontal felt coming from 
Germany.

I have been studying various damper felts to try to get an idea of the 
best dimensions.  I am planning to specify two sizes of bi-chord felt 
and tri-chord felt (for wound strings and plain wire strings).
I am very interested in getting some input from other technicians on 
what works for you, what doesn't work and what you like to see 
regarding damper felt strips.  Specifics or generalities regarding 
dimensions.  The felt quality question has been solved for me, it is 
now down to dimensions.  If you have a visions for the perfect cut, now 
is the chance to see it happen.
I am grateful for any input.
regards,
Jurgen Goering
Piano Forte Supply
(250) 754-2440
info at pianofortesupply.com
http://www.pianofortesupply.com

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On Nov 1, 2007, at 8:23, pianotech-request at ptg.org wrote:
> I'm putting new damper felt on a S&S M that we just put a new block in 
> and restrung.
> I have a set a grand damper felts from Pianotek Tokiwa and a set from 
> Steinway for an M.  The Steinway dampers for the trichord wedges are 
> really short in length (similar to another M sitting here waiting to 
> be done of same vintage) and shorter in heigth.  The ones we took off 
> which I believe were original were taller and longer.
> The Tokiwa trichords are longer.  I have a 3rd M sitting here that Ron 
> N. did and is awaiting refinishing and it has the longer felts.  These 
> dampers are working very well.  I'm not sure if they are Tokiwa or?
> How important is the pressure p.s.i. on the string for effective 
> damping?  Which felt sets do you prefer?
> Bob Hull
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