RE: Designing BIG Secondary Coil ASPECT ratios

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Original poster: "Mccauley, Daniel H by way of Terry Fritz <twftesla-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>





>>>>>>>>>>>>>>>> I've read a lot of places that 3:1 aspect ratio (H/D) was
optimum for coils larger than 12"???
Is this true, or generally not followed.

Thanks



Would suggest 18 to 24 in dia with a 4.5:1 height to dia. ratio.  36 x 8 in
toroid or 48 x 12 in toroid made inexpensively from McMaster-Carr flex-lock
aluminum duct hose, p/n 55335K for the 12 in. dia.and 55335K26 for the 8 in.
dia x 25 ft length ---both under $20.  Have a local "real good" local welder
weld the ends together and also weld a support cross brace.  Cover with
strips of Al tape from Home Depot and you're ready to roll.

Dr. Resonance