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You got my message spot on Carlos. The coil produces constant streamers about 20- 23 feet, or 6 - 7 meters. It's very impressive. But i did make a coil with 1 m winding length before, producing 3 meter sparks at 20 kw. so i expected around 10 meters with this set up. but 7 seems the max. > Big machines like this are typically less efficient than there smaller > brothers and sisters. > I have not taken the time to run the numbers on the info you provided, > but if the system is well balanced and in tune and pulling 40kva, I > would expect to see 20-25 foot long arcs at minimum. > The height of the coil will also be a limiting factor to some degree... > > I assume from your question that you are not happy with the performance > or it did not meet your expectations? > > Kind regards, > > carlos > > On 2015-01-02 06:03, vam@xxxxxxxxx wrote: >> Me and some friends built this coil. It's total height is 5 meters. the >> donut is 2,60 by 60 cm. the coil is 65 cm dia with 1200 turns of >> 2.5^2mm >> installation wire. about 3.6 meter winding length. Cap, DR resonance >> 100nF, 80kv 4 in parallel. >> We feed it with a 180kva 10kv yz5 transformer. Rectify the lot to 16kv. >> ballast ensures 32kv on the cap. at 200 bps we draw 50-60 amps per >> fase. >> so roughly 40 kw. Max bps is 700. >> Now the question. What kind of spark length should be possible from >> this >> coil? >> >> Picture of the coil. >> https://www.facebook.com/photo.php?fbid=671287332969054&set=a.110176789080114.14601.100002633816524&type=1 >> >> _______________________________________________ >> Tesla mailing list >> Tesla@xxxxxxxxxx >> http://www.pupman.com/mailman/listinfo/tesla > _______________________________________________ > Tesla mailing list > Tesla@xxxxxxxxxx > http://www.pupman.com/mailman/listinfo/tesla > _______________________________________________ Tesla mailing list Tesla@xxxxxxxxxx http://www.pupman.com/mailman/listinfo/tesla