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PostPosted: Mon May 12, 2014 1:12 pm 
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Mahogany
Mahogany

Joined: Sun May 09, 2010 6:10 am
Posts: 64
First name: David
Last Name: Radlin
City: Belle River
State: Ontario
Zip/Postal Code: N0R 1A0
Country: Canada
Focus: Repair
Status: Semi-pro
I'm looking at an early 70's Martin D-18. The original bridge has been shaved down at some point to forego a neck reset, so the bridge is not original.

Now the guitar has come to the point of needing a neck reset. The choice is either to neck reset to the original but shaved bridge, or replace the bridge with a reproduction at the original bridge thickness and reset the neck angle to the reproduction.

The guitar also intonates about 6 cents sharp at the 12th fret (although evenly across strings), so a new bridge provides a bonus opportunity to somewhat improve intonation.

I'm interested in opinions: preserve or replace the original shaved bridge?

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David Radlin
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PostPosted: Mon May 12, 2014 3:12 pm 
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Contributing Member
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Joined: Fri Mar 24, 2006 12:42 pm
Posts: 2360
Location: Windsor Ontario Canada
First name: Fred
Last Name: Tellier
City: Windsor
State: Ontario
Zip/Postal Code: N8T2C6
Country: Canada
Focus: Build
Status: Amateur
Give me a call Dave. I have a few Martin bridges on hand, will save you some work. I hate when people shave the bridges some repair people locally seem to prefer that option.

Fred

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http://www.fetellierguitars.com
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PostPosted: Mon May 12, 2014 3:27 pm 
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Old Growth Brazilian Rosewood
Old Growth Brazilian Rosewood
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Joined: Fri Nov 02, 2007 9:49 am
Posts: 13386
Location: Ann Arbor, Michigan
First name: Hesh
Last Name: Breakstone
City: Ann Arbor
State: Michigan
Country: United States
Status: Professional
Early 70's Martins had bridges located in the wrong place. They made tens of thousands this way because of a bad jig that no one noticed for a while... Repair folks have been addressing the issue for decades now. It's likely that the intonation issues that you are seeing are because the saddle slot is in the wrong place. Since Martin uses pre-slotted saddles this means the bridge is in the wrong place.

In your example the bridge should be tossed. A check should be made for proper saddle location and then you should also check to see if the pin holes need to be filled and moved for the new saddle location.

The shaved bridge should always be pitched (saved if it is part of something vintage and valuable, this is not one of those, yet...) and a new bridge made with the saddle in the correct location. None of this should be done until after the neck is reset to the height of a proper, unshaved bridge.

If by chance this belongs to the original owner it would all be covered under warranty.


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PostPosted: Mon May 12, 2014 5:17 pm 
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Joined: Tue Mar 01, 2011 1:32 pm
Posts: 3470
First name: Alex
Last Name: Kleon
City: Whitby
State: Ontario
Zip/Postal Code: L1N8X2
Country: Canada
Focus: Build
Status: Amateur
Hesh wrote:
Early 70's Martins had bridges located in the wrong place. They made tens of thousands this way because of a bad jig that no one noticed for a while... Repair folks have been addressing the issue for decades now. It's likely that the intonation issues that you are seeing are because the saddle slot is in the wrong place. Since Martin uses pre-slotted saddles this means the bridge is in the wrong place.

In your example the bridge should be tossed. A check should be made for proper saddle location and then you should also check to see if the pin holes need to be filled and moved for the new saddle location.

The shaved bridge should always be pitched (saved if it is part of something vintage and valuable, this is not one of those, yet...) and a new bridge made with the saddle in the correct location. None of this should be done until after the neck is reset to the height of a proper, unshaved bridge.

If by chance this belongs to the original owner it would all be covered under warranty.


Hesh, would it still be warranted even with the bridge shaved down? Does Martin replace and properly locate the bridge on these guitars to address the factory misplacement? If they do, they must have had to pony up for a lot of repair work!

Alex

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