I'm explaining more accepted fork tuning procedure. I have fine-tuned two forks this way and they work perfectly. Unless you are very knowledgable about the physics of tuning forks, the most practical way to do it is to shorten the tines a little bit. I would only do what you suggested in the fork was a long way out. To make a tuning fork ring optimally, you would ideally adjust the thickness of the tines in relation to their length, but for just fine-tuning them, this is not worth doing. ![]() You can do it the way you said too, but it's not much different when it's just fine-tuning. Care to explain that? Length affects mass, both of which which are critical factors that affects the frequency of a tuning fork. I've even got two of them in my possession which were fine tuned this way at the factory. ![]() A lot of tuning forks you buy have been finished off by hand and have been filed on the ends as I described. I'm sorry, but what I described will make a fork go sharper. To make the fork go sharp, you file on the inside of the legs up near the tips. To make the fork go flat, you file on the inside of the legs down near the "crotch". Both "legs" need to remain exactly the same length. ![]() For fine tuning of a fork you don't grind off the ends to make them shorter. If your grinder isn't fine enough, use a metal hand-file so you can remove finer amounts. If you proceed very carefully and slowly, you should be fine. Make sure both forks are the same length. grind it a tiny bit at a time and measure it regularly with an electronic tuner. [ You can re-tune a fork that is flat by grinding of some material from the ends of both forks.
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