DECEPTIVE READINGS on 55 MHZ TV direction

vk3six · Post by **vk3six** » Fri Dec 25, 2009 3:08 am

We discussed this in 1998.

VK3AUU · Post by **VK3AUU** » Fri Dec 25, 2009 7:21 am

A very timely post. The figures are well supported by all the modelling that I have done also. My 14 element yagi which has broader bandwith than most, goes right down the tube above 52 Mhz and is much worse off the front. At 55 MHz it has 2db gain off the back and -8db off the front.

Below 43 Mhz, the pattern is very similar to a dipole.
David

VK4QB · Post by **VK4QB** » Fri Dec 25, 2009 8:16 am

Hmm ,
Funny, thats just what Yagi found out ie. that the yagi array is a great SINGLE FREQUENCY highly directional array, but off the resonant frequency it is very useless as a directional antenna. Nothing new.!!! It beats me why it is used as a TV antenna !
Merry Christmas to all.
Brian 4QB

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DECEPTIVE READINGS on 55 MHZ TV direction

DECEPTIVE READINGS on 55 MHZ TV direction

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