[TowerTalk] Remote RF coax switch utilizing DC on coax

[Rick Karlquist]

Several people have asked about my beverage switching scheme.
I send a different DC voltage down the coax for each antenna
and have a circuit at the end that detects the different
voltages with comparators and activates an RF relay to select
an antenna.  I have posted an article about it at:

http://www.n6rk.com/Comparator_RF_switch.pdf

Rick N6RK