secondaries

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Original poster: "Mr Gregory Peters by way of Terry Fritz <twftesla-at-qwest-dot-net>" <s371034-at-student.uq.edu.au>

Hi all,

Just wondering. My new coil will be 10 or 12" diameter. 5 years ago, 
Richard Quick and Hull used to say that coils of this size should be 
wound with an aspect ratio of 3:1 eg: 10" diameter = 30" long. They 
should then be wound with a wire that allows between 800 and 1000 turns.
I've taken this advice with all my coils and have had some good 
results. However, lately, I have noticed some web sites with 10 and 12" 
coils (eg: Robin Copini's page and HVGUY) that have very large aspect 
ratios (4:1 and over). Has this general 3:1 rule changed since I last 
made a coil? What is the "general rule" these days?

Cheers,

Greg Peters
Department of Earth Sciences,
University of Queensland, Australia
Phone: 0402 841 677
http://www.geocities-dot-com/gregjpeters

"Why is it, that the level of fun created by an activity is directly 
proportional to the danger levels experienced, and inversely 
proportional to its legality?"