On 4/16/2012 12:20 PM, Jim Brown, K9YC wrote:
> Given that the vast majority of TV's are on Satellite or Cable, is their
> anything to gain by sticking a Low Pass Filter in the Transmission Line ?
> Put very simply, NO. And even if a TV is on an outdoor antenna, it's
> hard to find a good reason for an LPF. Since the final shutdown of
> analog TV several years ago, nearly all broadcasters have abandoned TV
> channels 2-6, so 174 MHz is the lowest frequency still in use in 95% of
> North America, and the majority of TV broadcasters are on UHF.
As a first-order approximation, Jim is correct.
However, the low-band VHF channels have not been totally abandoned. There are
even new applications for use of these channels. W9WI's web site has a wealth
of
information on USA and Canadian TV channel allocations (www.w9wi.com).
73,
Steve, N2IC
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