[TCML] NE Ohio Coiling Activities.
harvich at yahoo.com
Mon Jul 28 13:56:26 MDT 2008
Recently purchased variable speed AC drive for winding secondaries. With a slip belt drive at 5 hz we have produced a variety of secondaries of good craftsmanship, and are testing these also with a variety of primary designs.
Secondaries are wound on 4 in ID PVC tubing making for a 4.5 in OD. Two of these at ~1 ft have been wound with an ample supply of 23 gauge wire, and also a 2 ft winding with a higher h/d ratio/ which has entirely confused me towards its actual resonant frequency compared to the 1 ft model, and how the h/d ratio might change things. Today we wind another 1 ft section, but it is wound in the opposite direction to explore 2 ft secondary bipolar secondary models in comparison to entire horizontal 2 ft secondary wound in one direction vs two counter-wound secondaries of one ft. from the center out. In the counter-wound model both the (left and right) base spiraled primaries and secondaries will be wound mirror image to each other from the perspective of a center vertical plane dividing point; or in other words they are mirror images of each other.
My good colleague Doc, is the craftsman here and he has also built a secondary winding on a thin funnel shaped cone and a counterpart inverse conical primary, a very unusual design to wind to say the least. He operated this at my set parameters of 15 nf where I was operating at with a different helical designs of 1 and 2 ft; so I have no idea of what capacity should be correct for his design, but he still obtained weak effects. He put in quite a bit of effort here as the soldered top copper ball shows the hillbilly ingenuity; but he is not good with numbers, as sometimes neither am I and would like to post a pic of this in operation for others to guess at the correct operating capacity. But I dont know the procedure here at tesla list for posting pics. Doc is admittedly not a coiler but an artist, so his design is undoubtably a shot in the dark.
I will plan on a tentative NE Ohio Teslathon for Sept if interest shows. Things are finally coming together from years ago so this years project at the new property appears to be the operation of dual 360 hz 3 phase bus alternators to create a true three phase interaction on TC secondaries; which of course is a bold project. This is pending upon wiring 220 volts to the end garage here; but the variable speed drive might be tried for studying effects of frequency change.
Sincerely Harvey D Norris
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