-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Dave Tutelman Sent: Tuesday, February 04, 2003 2:25 PM To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: ShopTalk: Frequency meters and deflection boards I tend to disagree, but the issue is not as big as many would have it. In particular, I thought Jeff Sheets was full of it in the latest issue of Clubmaker, where he says that different machines give different readings. The things that make the difference are NOT the sensors or the electronics, as he implies; these are either right or wrong (as in they will give stable readings or they won't). They don't give DIFFERENT stable readings. Different readings come from the clamp and the tip weight.
How do I know? (1) I'm an electrical engineer by training, and I've designed a working frequency meter. You can get the plans from Clubmaker Online's resource page. (There should be a new issue of the article soon, with photos and descriptions of the clamps; John has the copy already.) (2) I've attended a "frequency meter calibration party", where three clubmakers brought their [different make] meters. We put a shaft in the clamp and put a weight on the tip, then used the three meters to measure that shaft without changing the clamping or weighting. The difference? 1cpm! That's just one unit in the minimum resolution of the meter. And that's ALL the difference you will EVER see due to sensors or electronics. Hope this answers your question. DaveT Dave: To add to your data base I have both a Cub Scout and Digiflex same clap different sensor's and direction of twang both give the same number for the same plane on shaft. Don Johnson
