[R-390] antennas

[John Kolb]

On the 390's we used on the Navy ships I was on, there was a
connector (right angle) which took the two pins of the balanced
input, shorted one side to gnd, and the other side to the center
pin of a "C" connector, where most often, it was connected to
a 35 foot vertical whip, fed either direct or through an antenna
splitter.

Don't know the splitter name - it divided the signal into bands,
2-4, 4-8, 8-16, 16-30, or something similiar, and had about
4 outputs for each freq range.

John

At 06:31 AM 10/17/2007, Rasputin Novgorod wrote:
>Hi Guys:
>
>My random wire connects via a 9:1 un-balun to 50 ohm coax.
>The shield is grounded. Because I had the correct adaptor,
>I connected the coax to "Unbalanced" antenna connector on
>the R-390A. It works well.
>
>But as I skim the schematics, it appears that the unbalanced
>antenna connector goes to the secondary side of the input
>preselector(?) CL filters. Does that mean I miss out in the
>first layer of filtering?
>
>The "Balanced" connection goes to the Primary side the
>"preselector". Would I be better off connecting there?
>I know some people connect an unbalanced antenna to the left
>pin of the "balanced" connector and ground the right pin.
>
>In the good old days, how would the military connect the
>Balanced connector to a dipole? Would they have some
>sort of 125 ohm dual conductor coax? Surely not
>ladderline.
>
>Perhaps instead of answering my questions, someone can tell
>me what I need to know...
>
>Sincerely,
>/blair
>
>
>
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