[Elecraft] OT ... Coax DC isolator

[mcduffie at ag0n.net]

On Tue, 11 Feb 2014 10:34:20 -0800 (PST), John Saxon wrote:

> I am experimenting with two different antennas and would like to switch bet=
> ween them with a relay. =A0I am considering getting an isolator that permit=
> s placing the DC control voltage on the rf coax. =A0Any thoughts on this? =
> =A0I have never done this before and would appreciate any advice/suggestion=
> s.

Well, I'm NOT using a K3 :o), but I use the MFJ 2-position remote switch and
have no issues with it so far.  It's nice to not have to install another run of
coax to the remote antenna location yet.  I intend to eventually, but it got me
by for now.  It's a 300 foot run and the switch works as advertised.  It comes
without a power source (they sell separately), but does have the DC inserter box
that the antenna 1-2 switch is mounted in.  It is unhandy to have it on the
shelf, because the coax hooks to it also.  But because they are merely switching
power on and off to the remote relay, you can leave it turned on, and switch the
power going to it via a desk mounted switch to accomplish the same thing.  Any
existing 12V supply will work.

Gary