Tuning Fork

[Don Smeller]

James,

Good job on casting the duplicate aluminum tuning fork.  Kevin and I found that the true frequency of the store-bought fork was not 512 but rather 523 hz.  Your sand box, sidewalk foundry version was 487, so we shortened it, little-by-little, until it agreed with the original. Give or take 1 hz.  Forks are on the big white table.  

Don S