Which antenna?

[Robotech2112]

Assuming a 50 foot run of LMR-400 for both... which of these 2 antennas will perform better at 851 MHZ mounted at 30 feet?

Do not care about other bands/ freqs. 851 Only. RX Only.

1) Tram 1411 or
2) Tram/Browning BR-6283

Thank You.

 

[popnokick]

The Tram/Browning BR-6283 will perform better at 851 mHz because it offers gain at 800 mHz frequencies (3dB per spec). The 1411 is a unity gain broadband frequency coverage discone. Since you "Do not care about other bands/ freqs." there is no reason to consider the 1411, which offers no gain at 851 mHz... and is not designed specifically for 800 mHz (the 6283 IS for 800 mHz).

 

[Robertolson]

800 Mhz is all your into, wouldn't a Yagi with it's 6+ gain work much better ?

 

[cmdrwill]

800 Mhz is all your into, wouldn't a Yagi with it's 6+ gain work much better ?

Not really, the BR-6283 fiberglass antenna has more aperture and are better receive antennas.

 

[popnokick]

The two antennas the OP asked about are omnidirectional. A Yagi / beam antenna focuses its pattern for receiving (and transmitting) in primarily one direction (and a specified beam width). So if the OP needed 800 mHz reception primarily from one direction, then yes the Yagi would be a better choice. But if the OP is interested in receiving from multiple directions, then and omnidirectional antenna will accomplish that. The other option would be to install a rotator to turn the Yagi antenna, but then when the Yagi was pointed to say, the west.... signals from other directions would be weaker or nonexistent.