K1jhj wrote:
Check
http://www.qsl.net/k1jhj/
for CoilCalc and CoreCalc, for air-core coils and toroid coils on T-type
cores.

Also see DL5SWB's 'Mini Ring Core Calculator' at:
http://www.qsl.net/dl5swb/minirk_e.htm

This is a core calculator linked to detailed data on a huge range of
toroids:
* The T-type iron dust range
* The Fair-Rite FT ferrite range
* The Siemens/Epcos/Siferrit range
* The Philips Ferroxcube range
* A very useful section on "unknown toroids" which works the
calculations backwards to find AL and mu-i

It also includes an air-core solenoid calculator.



--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek