[UK-CONTEST] Coil calculator (and other stuff)

[David]

The one I recommend is the Mini Ring Core Calculator

http://www.dl5swb.de/html/mini_ring_core_calculator.htm

This windows program apart from air core coils also deals with the popular
ferrite and iron toroids.

I have used this program to calculate about 40 air cored inductances and
apart from a little squeezing/spreading they have been bang on. The tweaking
needed probably due to the effects of screening and errors in capacitance
values and my construction technique.

73 David G3YYD