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Length change the note so unless your ear is tuned to a tollerance of a hew hertz a tension meter is very useful to guage absolute tension. Getting tension to within +/-5% of the average for one side is hard without a tension gauge again you need a very musical ear
We've covered this before. It's fairly easy to calculate the correct frequency from length + diameter + density + tension, include Young's modulus if you're concerned about the last fraction of Hz but it's not necessary because bicycle spokes are so thin so you can effectively disregard their bending stiffness. Generating the correct note from a soft synth is something anybody with enough computing power to read a web forum can do. The relative notes need to be about a quarter tone or less for spokes of the same kind, which is an interval most people can gauge pretty easily. There's even an app for iOs users :-)
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gbj_tester
@thecycleclinic
I have seen many wheels handbuilt that have come in the shop. most have tension way too low. I suspect they have been built without a tension guage. 1200N DS rear is what is needed, how do you know what that is without a tension guage. Length change the note so unless your ear is tuned to a tollerance of a hew hertz a tension meter is very useful to guage absolute tension. Getting tension to within +/-5% of the average for one side is hard without a tension gauge again you need a very musical ear. higher spoke count wheels are actually very forgiving which is why dron above has sucess. His tension may vary a bit than what I do but the wheel will probably last well. It the lower spoke count wheels that suffer quickly if poorly tensioned. Still if you are building wheels £60 spent on the PArk Tool TM-1 to guage relative tension is money well spent. To gauge absolute tension take away 10% from the tension suggested by the chart on a sapim race or DT comp to get you in the ball park.