Ed’s Shed: Before Buying a Guitar, Check for Nut Damage
Greetings, guitar tweakers. As promised in my last blog post, I’m gonna go nuts for a while.
Most of us don’t give our guitar’s top nut a second thought until something goes wrong. I bet the last time you bought a guitar, you didn’t spend much time checking the top nut ... if at all. We make a bigger fuss of scratches, dents and chips in the finish than the parts that influence the playability. We've all done it.
We guitarists can be gripped with a bizarre hysteria when we are trying out a guitar we really want. It pays to take your time and pay attention to details like the top nut, especially if you’re about to drop your hard-earned cash on a used guitar that has no warranty.
The top nut is the unsung hero on a guitar’s spec sheet. Not only does it keep the strings where they should be, and evenly spaced into the bargain, it also conspires with the guitar’s bridge saddles and truss rod to set the action (or string height) to suit your playing style.
So ... when you’re looking over a used guitar, make sure the top nut is in good shape. You should always check that the guitar is in tune, too.
Eyeball the top nut closely for signs of damage; even hairline cracks can cause problems. They could eventually get worse, so it’s best to catch 'em early on. Insist on inspecting the string slots in the top nut. It’s the only way to be sure, as someone said in a movie once. You’ll have to detune the strings before you lift them out of the slots, so it’s probably best to ask the seller’s permission first. People can be a bit funny about stuff like that.
With the strings out of the way, have a good look inside the slots (See pic 1 in the photo gallery below). If you see any cracks, I recommend that you figure the cost of a replacement nut into the guitar’s asking price. Don’t back down on that unless the guitar is already a stone bargain and you can’t wait to get your hands on it.
Pluck and listen to the open strings. If any of them are buzzing or rattling, it could mean the top nut slots are worn out or cut too wide for the gauge of strings fitted to the guitar. There’s an easy way to check if this is the case. Pull the string to the side behind the top nut (shown in pic 2, above, and in the photo gallery below). Now pluck the open string ... with your other hand, natch. If the buzz has improved or stopped altogether, it’s likely the string slot is too big.
If you intend to fit a heavier gauge of strings, then this whole wide slot scenario could work to your advantage. It helps if the seller allows you to fit the fatter strings before you hand over your cash. Again, that all depends on your skills of negotiation.
I’m going to cover rebuilding and recutting the slots in a top nut soon. Before that, I'll show you how to figure out if the slots are cut to the correct height (See pic 3 in the photo gallery below) and what influence the truss rod has on that.
See you next time!
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