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Old December 2nd 05, 04:50 PM posted to rec.radio.amateur.homebrew
 
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Default Need to build 100 mW UHF power amp

On Fri, 02 Dec 2005 06:27:23 GMT, "Neil Preston"
wrote:

I want to be able to send a UHF TV signal (400-800 MHz) from one end of the
house to the other. I have a UHF digital PLL modulator with an output level
of 7dBmV minimum, and would like to use it to feed a small linear 100 mW
"power" amp to a 1/4 wave whip.

I don't think I'll find such a critter very easily, (if at all) so I would
like some suggestions as to how I might find resources to build one. (Of
course, a pre-designed schematic and PCB layout would be ideal!)

Anyone have any suggestions as to where to start? (Besides Google... BTDT.)

Neil Preston, CET


There are legal issues to doing that in most countries. Besides 100mw
is a lot of power for maybe 100ft. You need maybe 10mw and thats a
lot less of an effort. Also if you target isn't moving a corner
reflector at each end will make a big difference.

One last thing most TV system antennas are dipoles and horizonatlly
polarized TX and RX antennas should have the same orientation.
Ignore the gastly bad monopole that comes with TVs for UHF.

Allison