[BC] Commercial Station Feeding A Commercial Translator Question

Tom Radiofreetom at gmail.com
Wed Oct 17 18:37:12 CDT 2007


Tall Tower

Umpteen - element Yagi

Mast-mounted preamp

Luck

not necessarily in that order.  :D

Seriously, if you can pull the station in with a typical TV antenna 
on a tower, a Yagi cut to frequency and exhibiting ~20 dB gain or 
more should pull enough signal for full quieting on the 
receiver.  Off the top of my head, you're looking at a Yagi with 
maybe 7-8 elements.  Preamp on the tower with enough gain to overcome 
cable losses and still insensitive enough to not overload on the 
Yagi's output.  Oh, and don't forget the notch filter - preferably 
two - one bandpass on the incoming frequency, and one bandstop on the 
translator output frequency. (With that much gain, 
belt-and-suspenders time!)  Also helpful if the receive and transmit 
antennas are on separate towers - or at least separated vertically by 
more than one wavelength.

Just a rough guess on my part, though... YMMV

Tom S.

Paul B. Walker, Jr. wrote:
>This commercial station in the midwest plains has 60KW at around 300 feet
>  in the 95 to 96mhz range.
>I want to know how it can, safely and reliably, feed a commercial translator
>over 90 miles away with any sort of useable signal?
>
>I know radio-locator.com is for "entertainment" purposes only, but R-L
>doesnt even show the FRINGE signal of the originating station coming
>anywhere remotely close to the translator's location.
>
>I'm not schooled too well on translators and such, so forgive me if I've
>asked a silly/stupid question!
>





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