Erik Christiansen wrote:
>
>
> The "normal" TV antennas we have here are Yagis, i.e. a metal pipe with
> crossbars decreasing in length toward the end which is pointed at the
> transmitter. The second-last "crossbar" is comprises two insulated
> halves of the receiving element, which are connected to 300 Ohm ribbon,
> or via a Balun to 75 Ohm coax cable.
>   
A Yagi is a single-frequency (or at least narrow-band) antenna.  Most TV
antennas are at least partly a log-periodic array, possibly with 
something else
for UHF band.

Jon

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