[CAUT] Double loop German stringing

[Ron Overs]

Gordon,

>So the benefit of using a double loop (or eye) is that it does not 
>cinch up on the hitch pin like a single?  Is there any other 
>advantage?

Very often, in the case of a conventional twisted eye, the twisted 
length before the eye will run over the stringing pillow and into the 
active back-scale length. This will tend to reduce the flexibility of 
the back-scale and, the ability of the soundboard to be effectively 
driven at fundamental frequencies. When a vertical hitch is used the 
above-mentioned stiffening effect of the twisted pair will be avoided 
since the back-scale length will make first contact at the vertical 
hitch pin somewhere towards the back or sides of the pin.

The use of a double looped German eye, in cases where the twisted 
pair extends to the active back-scale, will result in improved 
back-scale flexibility. For short pianos with overly short back-scale 
lengths and twisted eyes, the low bass tonal improvement of the 
double looped German eye can be significant.

>I have probably over thought this, but I'm wondering if the double 
>loop can cause the wire to leave the hitchpin slightly higher (like 
>1/2 the wire thickness) then a single loop, thereby affecting 
>downbearing.  Probably too little to be a concern, (?)

Yes, this will occur if the back scale length runs straight to the 
bridge from the hitch pin. For those pianos with a strip (stringing 
pillow) to control string height, the thickness of the extra coil 
will be of no consequence.

Ron O.

>
>Gordon Large, RPT
>
>
>
>-----Original Message-----
>From: Dennis Johnson <johnsond at stolaf.edu>
>To: caut at ptg.org
>Sent: Sat, 23 May 2009 7:55 am
>Subject: Re: [CAUT] Double loop German stringing
>
>It's not authentic, but I like the double loops and use them 
>regularly for all tied strings on any piano.
>
>Dennis Johnson
>
>
>
>
>On Fri, May 22, 2009 at 12:12 PM, Jon Page 
><<mailto:jonpage at comcast.net>jonpage at comcast.net> wrote:
>
>Ron Overs posted his jig for making the double loop, with a center 
>bend so it doesn't cinch up on the pin.
>--
>
>Regards,
>
>Jon Page
>
>
>
>
>A Good Credit Score is 700 or Above. 
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-- 
OVERS PIANOS - SYDNEY
    Grand Piano Manufacturers
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