balun spec depending on coax impedance
Bob Miller wrote:
On Wed, 01 Mar 2006 18:20:29 +0100, Charly wrote:
Dear all,
Usualy, people use 9:1 balun to connect a wire or dipole antenna to a 50 ohm coax.
A resonant dipole, I believe, is about 72 ohms. Connecting it through
75 ohm TV coax to a 50 ohm receiver input should be a near ideal
match.
On non-resonant frequencies, the dipole will present different
matches. That shouldn't be a problem, though, just for listening on a
sensitive receiver.
A balun won't give you a decent match except on the single frequency
it is designed for. That's one problem you run into, putting a balun
on a multi-band or multi-frequency antenna.
Single frequency?
dxAce
Michigan
USA
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