On Apr 8, 2015, at 8:24 PM, W2HX <w2hx at w2hx.com> wrote: > Not mine, just passing along > 151643166819 There is also a tuning fork, said to be 180 vibrations per second for Kleinschmidg machines: eBay item number: 141411259652 Roy Roy Morgan k1lky68 at gmail.com K1LKY Since 1958