[Antennas] DC voltage on coax

Fri Nov 5 07:12:01 EST 2004

Never have dealt with Sat dishes or similar have you? A RF choke and
some caps are involved....
The caps allow the DC to be injected onto the coax while isolating the
coax path in one direction from the DC...the RF Chokes keeps the RF from
coming out the DC leads...
Look at the ARRL Handbook for info on what parts you need.....the ckt
would be:
RIG------>cap->--------------------------------cap-->antenna, etc
 | |
 rf choke rf choke
 | |
 bypass cap to gnd bypass cap to gnd
 | |
 DC input DC output
Chris
WB5ITT
> -----Original Message-----
> From: antennas-bounces at mailman.qth.net 
> [mailto:antennas-bounces at mailman.qth.net] On Behalf Of Nelson 
> Wittstock
> Sent: Wednesday, November 03, 2004 12:01 PM
> To: antennas at mailman.qth.net
> Subject: [Antennas] DC voltage on coax
>>> I am currently enjoying using a pennant receiving antenna for 
> 160 meters. I would like to add another for a different 
> direction but this means having a DPDT relay at the junction 
> of the pointed ends. I need to get voltage to the relay and 
> I would like to do this by routing the voltage through the 
> coax feed. Can someone direct me to a site showing how this 
> can be done? I know I have seen plans for it but cannot find 
> the information now.
>> Thank you,
> Nelson - K8DJC