Steve, oh, thank you so much for this information. I didn't even think about
that. However, I am thinking about using the remote switch to switch between
two antennas I plan to put in my attic. They will not be going through the
entry panel box that I'm using for my stealth, exterior antennas. Someone
else wrote to me to let me know that the remote antenna switch cannot be
used with antennas using a balun; or at least, one of the two antenna jacks
can't. In other words, evidently, one coax jack can be used with a balun and
the other cannot. 

Ron, K8HSY



-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Steve Forst
Sent: Friday, May 01, 2015 10:03 AM
To: [log in to unmask]
Subject: Re: MFJ Remote Switch, MFJ-4712

Ron,

I don't use this switch and can't answer any of your questions about it. 
  However, if you will be using it in conjunction with your entry
panel/lightening arrestor setup, you need to factor that into the equation.
Some arrestors will pass DC, and others need  a way to get DC 
around the arrestor.     I'm not really up on this stuff, but  you might 
want to look at this aspect as well as your other questions.

73, Steve KW3A




On 5/1/2015 10:34 AM, Dr. Ronald E. Milliman wrote:
> Has anyone here had any personal experience with the MFJ Remote 
> Switch, MFJ-4712? If so, how well does it work, and how is the 12 
> volts fed to the remote switch using the coax to carry the necessary 
> voltage to the remote switch? That is how do they separate the RF and 
> the DC? I know how I would do it if I were designing the switch, but I 
> would like to know how MFJ does it.
>
>
>
> Ron, K8HSY
>
>
>
>
>
> Dr. Ronald E. Milliman
>
> Retired Professor of Marketing
>
>
>
> President: Millitronics, Inc. (millitronics.biz)
>
> President: A3 Business Solutions (a3businesssolutions.com)
>
> President: M&M Properties
>
> President: South Central Kentucky Council of the Blind (SCKCB.ORG)
>
>
>
>
>
>
>