[TowerTalk] Common Mode RF choke on a 50 MHz yagi

[Richard (Rick) Karlquist]

The simplest way to make a 50 MHz common mode
choke is to use 56 inches of coax and connect
one end to the feedpoint and connect the shield
of the other end to the boom.  Then connect
your regular feedline to the end of the
56 inch cable. Let the coax hang down in a
lazy "U" away from the boom.  Whatever you do,
don't be "neat" and tape it to the boom.

I suspect this configuration is somewhere
in the ARRL VHF handbook.

73
Rick N6RK