Rescaling GH1 tenor section

[David Ilvedson]

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But the wound strings in the tenor sounds like something this=
 fellow can handle with ease and make a big improvement...i.e.=
 without having to send it to you...;-]

David Ilvedson







Original message
From: Terry 
To: Pianotech 
Received: Fri, 25 Feb 2005 21:07:29 -0500
Subject: Re: Rescaling GH1 tenor section


Joe Garrett wrote:

I did exactly that, back in the late 70's, (at the request of=
 Yamaha, I might add.<G>). It is definately the way to go. You=
 will need to change the plain wire to wound on the tenor bridge.=
 It's been a while since I've done one of these, (I've done=
 several, al with excellent results!) As I recall, the first 6=
 notes on the long bridge need to be wound. I still have the=
 scale data, somewhere in my 'puter cobwebs, but I'd have to=
 search for it.
 
It is not necessary to modify the bridge in any way. just use the=
 outside bridge pins of each note, leaving the center blank. 
 
Well yes, that is one way to go  - and one that will definately=
 yield improvement - but not necessarily the approach that yields=
 the most improvement.
 
Also, the same for the tuning pins. As I recall, I left the=
 "blank" tuning pin in place, so that it had a nice appearance.=
 You will have to add som hitch pins. As I sent all of my=
 schematics/blueprints to Yamaha, I don't have a copy of the=
 hitch pin pattern. It's fairly easy to  figure out where they=
 need to be added. It is suggested that you add the hitch pins=
 BEFORE ordering the strings, so that all dimensions of tails,=
 winding start/finish, will be correct. 
You may be able to get all this info, plus the exact strings,=
 from Yamaha, but I don't know wether they consider this an=
 "antique" piano and would want to be bothered. They do have all=
 of the information, as I presented it, hopefully. After all they=
 did pay me to do the research on it.<G> Since that time they=
 used the info on their next version of the GH-1 and then for=
 some darned reason, changed it two more times, (not for the=
 better, either, IMHO)!
One big caution: The original GH-1 had little or not support=
 beams, so the piano is really squirrely! Remove only the=
 absolute minimum strings to access the area for hitch pins etc.!=
 It will go 20+ cents sharp when you do this! Not to worry. Once=
 you have the new strings on and tuned, the darned thing will go=
 right back to pitch, (pre-work pitch)! Go figger.<G>
Once the work is done, you'll probably have to correct the=
 "voicing" that was previously, (and to no avail), done, in that=
 section. Once that is taken care of, you'll love how nice that=
 "transition" can be, for a small piano.
 
Hmmmm, you'd likely notice a significant improvement in the=
 transtion, but to experience "how nice" a transition can be,=
 you'd want to consider adding a transition bridge - or more!
 
Terry Farrell
 


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