wrote:
Possibly this has been posted previously...but just in case:
http://www.bcdxc.org/balun_information.htm#Ed,%20WA2SRQ

Thanks for the URL. There are a couple of points to make.

When I suggested that 40 turns might be required for 75m,
I was chastised for my statement. Note that the above URL
contains data on a 38 turn choke on a 4.5" coil form for
75m operation. The choking impedance is 1300 ohms on 75m.
Parallel self-resonance on 75m would require more turns
than 38.

Much of the "Ugly Balun" information should be ignored. It
is not possible for an ugly balun to be "effective" from
1.8 MHz to 30 MHz. Note there are no impedance measurements
to back up the ugly balun's claim of being "effective" over
that frequency range.
--
73, Cecil, http://www.qsl.net/w5dxp