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Old October 1st 06, 08:21 PM posted to rec.radio.shortwave
David David is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 837
Default Antenna question

On Sun, 1 Oct 2006 12:29:23 -0400, "Unrevealed Source"
wrote:

The last sentence in one of the paragraphs says it all. The balun "is for
use on radios with low-impedance
(50 ohm) antenna connection."

The question is what if the radio doesn't have that, and you want to connect
the outside long-wire to the high-impedance input? It seems inefficient to
use two baluns, one on each end.


You need to match the wire to the coax a lot more than you need to
match the coax to the radio.

The rule is Low Z can feed High Z, but High cannot feed LOW. Think of
pipes. Low Z = Narrow Pipe; High Z = Fat Pipe. Water can flow from
narrow pipe to fat pipe but not vice versa.