On Thursday, May 24, 2012 09:59:35 PM John Thornton did opine: > My research shows that a suitable single phase motor to drive a > generator does not exist above 7.5 hp and even at that level your > talking >1k. I assume it would take more than 7.5hp to drive a generator > capable of running a machine that size. So I really don't see this as an > option at this point. > I hadn't considered that aspect of it John, but I suspect you are 99.44% correct.
> Heck I couldn't even figure out how to get 2 traces to show up much less > try for 3 on the scope. I even tried to join the teck forum but they > must have thought I was a spammer or they don't moderate it any more Not surprising. The tektronix that existed in the 60's, was gone by the late 70's and its all been downhill since (IMO). Most tek scopes are at least dual trace, is that one a single trace? There are even 4 trace scopes out there, Hitachi makes a fine one. But in a pinch, set the camera on a tripod, hook the scope up, triggered by its internal line sample, then adjust the sweep speed to show about 1.5 cycles and take a pix. Move the probe to the next phase and take a pix, and finally to the 3rd phase and take another picture. Then disconnect the probe as its not made for continuous duty at those voltages. Then, using the scopes face bezel as the registration, merge all 3 shots into one common image. Since the scope is synched to its own supply, the phase differences can be measured from this merged image. My guess is that the positive going slope of the 3 traces will not be equally spaced horizontally. And it should be. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> Do you know the difference between a yankee and a damyankee? A yankee comes south to *_____visit*. ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
