Another 'Concertone' Parlor Guitar Project

If you have a string instrument of any kind that needs fixing, a mistake you made in building a new instrument that you need to "disappear," or a question about the ethics of altering an older instrument, ask here. Please note that it will be much easier for us to help you decide on the best repair method if you post some pictures of the problem.
Steve Woods
Posts: 39
Joined: Wed May 01, 2013 7:27 pm

Re: Another 'Concertone' Parlor Guitar Project

Post by Steve Woods »

I was just going to put one in the middle.
Michael Lewis
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Joined: Thu Jan 12, 2012 1:22 am
Location: Northern California USA
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Re: Another 'Concertone' Parlor Guitar Project

Post by Michael Lewis »

Your selection of CF is not what I would recommend for making the neck stiff. Try to flex it in your hands and you will see it flexes pretty easily. The main strength of CF is in tensile mode, so maybe you can make up an "I" beam or "T" bar with what you have. For setting up for maximum tensile effect set the CF as close to the back of the neck as you can manage without breaking through the surface. Usually leave about 1/8" of wood between the beam and the surface of the back of the neck. A "T" or "I" beam will make your CF stiffer because it makes more distance between the opposing surfaces where one tries to compress and the other tries to stretch.

Measure carefully to determine how much room you have to work with between the fingerboard and the back of the neck.

CF glues well with CA or epoxy if you get the surfaces 'open'.
Steve Woods
Posts: 39
Joined: Wed May 01, 2013 7:27 pm

Re: Another 'Concertone' Parlor Guitar Project

Post by Steve Woods »

So here it is...

Image

The soft basswood neck is now straight and with the one CF rod down the middle has ,so far, not deflected at all when brought up to pitch with a set of .011-.052 strings. This basket case was described by the seller as a "wall hanger" but now it plays and sounds pretty good for a cheap Montgomery Ward mail order guitar from the 1920/30s. Thanks again for all you's guy's help.
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Mark Swanson
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Joined: Thu Jan 05, 2012 11:11 am
Location: Grand Rapids, Michigan USA
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Re: Another 'Concertone' Parlor Guitar Project

Post by Mark Swanson »

Good job! If only it could talk.
  • Mark Swanson, guitarist, MIMForum Staff
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