Dub
Administrator
I'm gettin' so the past is the only thing I can remember.
Posts: 19,903
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Post by Dub on Sept 4, 2023 17:38:18 GMT -5
I ordered the KWORK tuning forks and they were delivered today. www.amazon.com/QWORK-Virbration-Singing-Resonator-Experiments/dp/B0B4ZC4P2SThey aren't quite as pictured. The images make them look cast and machined. The forks I received appear to be made from bent stock with a handle welded onto the bottom. Also the resonator boxes are nothing like the quality of Wittner's. Still, they seem to work properly. As I expected. they aren't quite 440Hz, and neither are they exactly the same. One vacillates between 439.0 and 439.1 while the other between 439.1 and 439.2. As pictured, there is a sliding weight with a set screw that can slide up and down one of the tines. The one I got is plastic whereas the one pictured appears to be metal. Still, it works fine lowering the pitch to different frequencies depending on position. I'm going to try carefully reducing the tine length on one of them starting with a mill bastard file and moving to finer abrasives. I'll take a couple of swipes and recheck until I get to 440Hz. At least that seems reasonable to me. Anyone with a better idea, please speak up.
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Dub
Administrator
I'm gettin' so the past is the only thing I can remember.
Posts: 19,903
|
Post by Dub on Sept 5, 2023 0:12:37 GMT -5
Update.
I retested the frequency of the two forks using the Peterson iStroboSoft tuner app on my iPhone. I normally have the acoustic guitar (ACG) sweetening setting on when I tune an instrument. I also engaged the noise canceling option.
What I found was that both forks read at 339.3Hz and the strobe display indicated that value was slightly sharp. That surprised me since 339.3 is flat of 440. Then I realized that they were only sharp of the Peterson ACG sweetener setting. That means I often am tuning to 339Hz or so anyway because that compensates for the slight stretching of a string when noted.
So maybe these forks are already perfect as delivered.
If you use a Peterson StroboClip tuner, you’re probably using the same sweetening algorithm.
On edit: my Wittner fork is dead on at 440Hz.
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Post by coachdoc on Sept 6, 2023 13:52:35 GMT -5
My little SoundHole clip on is convenient, unobtrusive, and acceptably accurate.
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Post by Rob Hanesworth on Sept 6, 2023 17:26:54 GMT -5
I have a friend who is a retired engineer. His advice is to just follow the rails and be alert for yahoos trying to beat the train through the crossing.
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