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Scale length with a floating bridge
http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=25737
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Author:  000lover [ Thu Jan 28, 2010 3:35 pm ]
Post subject:  Scale length with a floating bridge

Reconditioning an archtop and the fretboard broke and is a little warped. I would like to replace it but how critical is getting the exact scale as the original fretboard? Since the bridge is floating would it really make a huge difference if the scale was 24.75 or 24.34? Also, what about the total frets...this one has 19. Is it bad to do 20?

Author:  Michael Dale Payne [ Thu Jan 28, 2010 3:41 pm ]
Post subject:  Re: Scale length with a floating bridge

You should be able to determine the scale length from the fretboard incraments or the nut to the 12th *2. The relative position of the bridge is + compensation and a little fine adjustment for intonation

Author:  000lover [ Thu Jan 28, 2010 3:54 pm ]
Post subject:  Re: Scale length with a floating bridge

Yes, but how important is it to change that ( the original fretboard scale length) since the bridge is floating?

Author:  Barry Daniels [ Thu Jan 28, 2010 3:55 pm ]
Post subject:  Re: Scale length with a floating bridge

I don't think it wise to change the scale length too much. However, a quarter inch would probably not affect anything.

Many archtops are made with notches in the f-holes which are used to line up the position of the bridge. And this will be off if you change the scale length, but not a big deal.

Changing the number of frets should not be a concern as long as your fingerboard length covers the neck extension adequately.

Author:  evanmelstad [ Thu Jan 28, 2010 3:58 pm ]
Post subject:  Re: Scale length with a floating bridge

As long as it fits I imagine adding another fret wouldn't cause any problems if the fretboard extension is cantilevered.

Don't know about swapping the current fretboard out with a different scale length board though. I know it'd most likely be a bad idea on a flat top.

What sort of bracing is on the archtop?

Author:  000lover [ Fri Jan 29, 2010 11:30 am ]
Post subject:  Re: Scale length with a floating bridge

evanmelstad wrote:

What sort of bracing is on the archtop?



It's the normal parallel bracing...i think that's what you call it idunno

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