[pianotech] Bass String Length Mismatch Tuning Trouble

[Jerry Cohen]

It looks like even the hitch pins are parallel to the bridge pins. (Although the photo only shows the first few.) 
That means each bichord pair should be identical and interchangeable.This was probably not the string makers fault, but was given bad data or a bad set to duplicate.

I have no idea if the slight wrap is significant.

Jerry Cohen, RPT
NJ Chapter

From: Terry Farrell <mfarrel2 at tampabay.rr.com>
To: pianotech at ptg.org
Cc: 
Sent: Friday, January 7, 2011 8:25:15 AM
Subject: Re: [pianotech] Bass String Length Mismatch Tuning Trouble


The wrap terminations are at the same position (equal 
>distant from speaking bridge pins) at the bridge end, thus rendering 
>unequal wrapped speaking lengths.
Photo below - same piano, bridge end. Wrap positioning very even.


Terry Farrell

On Jan 7, 2011, at 7:25 AM, Brian Trout wrote:

Just outta curiosity, what did the other end look like?  Were the wrappings done in "long-short-long-short, etc" fashion all the way down through the bichords?  Or were they offset kinda like they would be if put on in the wrong order with staggered hitch pins?  
> 
>Inquiring minds...  ;-)
> 
>Brian
> 
>From: mfarrel2 at tampabay.rr.com
>To: pianotech at ptg.org
>Date: Fri, 7 Jan 2011 06:49:28 -0500
>Subject: [pianotech] Bass String Length Mismatch Tuning Trouble
>
>
>I don't have much experience with un-equal length bass string unisons 
>that can't be tuned beatless being fixed with new equal-length 
>strings. Has anyone done this, and can anyone offer an experienced 
>opinion on whether lengths of a couple millimeters difference in the 
>wrapped speaking length in a pair of unisons would commonly present 
>tuning problems? Needless to say (I think?), I found all the bicord 
>pairs in the picture below to be impossible to tune beatless - the 
>best I could do was leave most of 'em with slow roll. A few were a 
>fair bit worse. The wrap terminations are at the same position (equal 
>distant from speaking bridge pins) at the bridge end, thus rendering 
>unequal wrapped speaking lengths.
>
>The work on this Baldwin F blew me away - it was "rebuilt" by a 
>company that is quite arguably the most respected in my area (or at 
>least best known because of brand affiliation).
>
>If you ordered a set of strings, installed them and saw this, wouldn't 
>you send the back to the string maker (after checking your 
>measurements again to make sure you didn't provide bogus data)?
>
>Terry Farrell
>
>
>
>
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