[Antennas] DC voltage on coax

Wed Nov 3 22:47:23 EST 2004

Use a series cap to isolate the DC from the radio and antenna. Then feed/extract the DC with a series 1mh RF Choke that is applied after the cap to the radio.
ANT-----||----------------------||-------radio
 | |
 | |
 RFC RFC 
 | |
 | |
 Relay +Volts
 coil
Hope you get the idea. We did this at Collins years ago on a CATV/FDM Telephone system on RG-59 Coax.
73
Bill, W0LPQ