On Wed, 20 Jun 2007 06:40:34 -0700, John Smith I
wrote:

Buck wrote:

to indicate the approximate diameter and number of turns ...
Does anyone know where I might find that formula?


Buck:

Some designs for the "ugly balun" appear to vary, sometimes widely.

I don't know how a fellow could go wrong if they take into the reactance
of the coil (to the freq/freqs in question) and make that at least 5X
the impedance of the coax in question. At the higher freqs, I prefer a
10X ratio, 160m makes the 10X ratio cumbersome.

Others may provide info to suggest other routes ... or more desirable
solutions ...

Regards,
JS

Is this 5 times the diameter in turns?


--
73 for now
Buck, N4PGW

www.lumpuckeroo.com

"Small - broadband - efficient: pick any two."