I had a system at a UHF TV station site for a while, and it
really hits home when you look up at the ceiling and see
two Bird line sections mounted into the transmitter feedline...
one line section is for forward power, the second, bolted
in line with the first, is for reverse.
Then you notice that the REVERSE power slug is 5kw....
Mike WA6ILQ
At 04:18 PM 12/20/07, you wrote:
Isn't it amazing how little 1% affects us as compared to the big boys? Lol
Chris
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Jim
Sent: Thursday, December 20, 2007 12:26 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Radial Ice, Detuning
Paul Plack wrote:
> FM and TV Broadcasters go to much trouble and expense to maintain
> antenna heaters to deal with this issue. Some use ice detectors which
> evaluate precip and temp on the tower, to turn on the antenna heater
> automatically when conditions are favorable for ice formation.
> Otherwise, ice can form so fast the heaters can't keep up, and some
> broadcast stations have to shut down when SWR gets too high due to
> ice.
heh-yeah, even 1% reflected on a 100,000 W TV station is 1000 W of
reflected power!
--
Jim Barbour
WD8CHL
