Dating martin ukulele tuners
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This tuner supports the most popular ukulele tunings, which you can select at the top.
Once you're certain you've heard the pitch, pluck the top string, or the g-string (4th string), on your ukulele. If the pitch of the plucked string is higher than the pitch of the sound playing on the tuner, that means the string on your ukulele is sharp.
If the pitch of the plucked string is lower than the pitch of the sound playing on the tuner, that means the strings on your ukulele is flat.
I did some tests on scrap first (see the picture above), and found I only needed about 1 to 1.5 turns on my hand drill to make a nice chamfer for the bushing to sit neatly in.
So I made the same chamfer on the top of the headstock, and used the 100 degree bit for the back. However, the thickness of the headstock is about 1/32 of an inch too thin for the bushings to sit down perfectly in the chamfers! I really wanted the bottoms of the tuners to fit well, so I decided to use some plugs in the top of the tuner holes to make a new surface for the bushings to sit in. The chamfer made the top bushing sit just a little too deep in the hole.
To tune your ukulele by ear, listen to the pitches as a point of reference for tuning your ukulele.
Since I wanted the tuners to look right, I got the proper 60 degree (for the bottom section of the tuner where it meets the underside of the peghead ) and 100 degree (for the top side) countersink bits.
You see them here - I got them from Mc Master-Carr.
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