Reg, he was a peron who also had your idea ( or maybe it was Heaviside's) of
winding coils on as large a diameter as possible until losses were a matter
of minimum return. By experimentation he came up with desirable' form
factors ' that related to number of turns wound in relationship to the form
diameter upon which the coils were wound,
Unfortunately I cannot find what his criteria was for his descisiion that a
pancake design could not meet.
I am winding a pancake coil at the present time wound
basket weave style on a wheel spoke basis using corrugated hardline with
which to experiment with respect to my antenna coupling design.,
Terman was an American academic who substantiated a lot of his work by
experimentation. Iin other words he was a do'er as well as a talker who
dealt with facts rather than supporting himself with inuendo if you get my
drift.
Cheers
Art

"Reg Edwards" wrote in message
...
Art, what's a form factor and who's Terman.