Subject: Litz wire verses solid wire what is the difference?

My question is when you use litz wire in an air core isolation 
transformer, 
1) which formulas are used? 
2) Which air core calculations?

They are not the same as solid wire. 
Isn't 22 gauge 20 strands at 33 gauge (22g 20/33g) equal to a solid 20 
wire? Maybe in speaker wires?

Example; air core transformer with a tuning rod.
The rod increases the henries when inserted.
36 turns primary clockwise on a 5/8 inch hollow tube 1.5 inches long.
15 mHenries, .5 ohms dc.
Secondary is 166 turns clockwise on the other end.(note secondary is wound 
counter clockwise with respects to primary. 
Secondary is wound ontop of primary. helical wrap; wires are not wound 
side by side) Secondary is 50 ft long 22g 20/33g litz, 543 mHenries, 1.5 
ohms dc. 22g 20/33g litz = 22g diameter.
Primary input is 55 vac pp, npn collector. 2n6543



http://www.dartmouth.edu/~sullivan/litzwire/litz.html
http://kosys.home.mindspring.com/articleproxy/articleproxy.html
http://www.neewcweb.com/litz/litz05.htm
http://www.mwswire.com/litzmain.htm
http://www.wiretron.com/free.html
http://members.tripod.com/~schematics/xform/xformer1.htm
http://www.tnt-audio.com/clinica/spkcbl_e.html

Re: Litz wire verses solid wire what is the difference?