Duplex

[Richard Brekne]

Ron Nossaman wrote:

> Susan, Ric,
>
> > In the end if the tension of the duplex length is not the same
> >as the rest of the string it would seem one is asking for an untuned
> >piano.
>
> This is precisely the condition that we leave in every piano that we have
> ever tuned. Leaving equal tensions in every segment in any one string we
> tune is wildly unlikely, much less for an entire piano.
>

Ok.. granted... to some degree or another, tho I hold in reserve that again we
are probably less certain of our facts here then perhaps we want to think. But
despite that it stands to reason that some techs have a better nack at solving
this part of the tuning puzzle then others and this probably is one contributing
factor to why some tuners work holds much better then others ... or what ?

>
> >Now if one accomplishes this by some massage proceedure then
> >fine, but if this is used to "tune" a duplex at the expence of said
> >even tensions... then it sounds like trouble with a capital T.
> >
> >Richard Brekne
>
> As stated, the massage procedure was an attempt to force strings through
> high friction points to more nearly equalize segment tensions, not to tweak
> tuning. I thought this had been explained pretty thoroughly, and repeatedly.

Seemed to me to be a wash of several reasonings by several people... but ok
perhaps I misread... shore nuf wouldnt be the foist time :)  But if massaging
then is supposed to accomplish this... how are we to ascertain when the tensions
are really equal ?? If we were to go by sound then we would have to know in
advance just exactly what pitch these segments were supposed to sound at. And
there seemed to be a lot of reasonable argumentation made as to why this would
not be possible. You could get ball park results perhaps at best ?? And if we
dont go by sound ?? we dont carry string tension measuring devices around with
us do we ?? :)

But like I say... I have considered and dealt with the front duplex, but not the
rear. And in "tuning" the front duplex I mean determining the desired placement
of the counterbearing.

>
>
> Ron N




--
Richard Brekne
RPT, N.P.T.F.
Bergen, Norway
mailto:rbrekne@broadpark.no