[pianotech] Little Cloth "Mutes"

[William Monroe]

So you go for as short as reasonably possible?

WRM


> William Monroe wrote:
>> Hi Ron(s),
>>
>> To revive this a bit, I'm curious, Ron N. how you decided upon location 
>> of
>> your replacement for the duplex.  Did you just move it to the front of 
>> the
>> webbing area of the plate, or were you trying to achieve a certain length 
>> of
>> "duplex" segment?
>
> Del wrote a Journal article some years back on his research into what 
> factors produced noisy front duplexes. It's primarily a combination of 
> length and bearing angle. I found his information to be dead on in 
> practice (thanks Del). So I try to make the duplexes as short as I can 
> practically get them, and somewhere around 15°-20° counter bearing 
> (enough, but not creating rendering problems). The length is more critical 
> than the angle. I can usually get down to at most 30mm lengths, which is 
> nice and quiet at these bearing angles. The SD-10 terminator modification 
> I posted a while back made the "duplex" length about 10mm, which was also 
> nice and quiet at a much lower angle.
> Ron N
>
>
>