[TowerTalk] Log Periodic Antenna recommendation?

[Tom Rauch]

> Could you folks steer me in the right direction of a good log Periodic
> Antenna ?
> 
> The one I am looking at is the Tennadyne 10 ele. (T-10)

I'm not sure how well the Tennadyne antennas work, but one thing 
that bothers me is Tennadyne's feed system. 

They have two "hot booms", they put a balun at the feedpoint, then 
they run the coax back along the boom the shield connects and 
exit to the tower without a choke at that point!

That means the shield leaves the antenna with voltage on it, and 
also that the balun at the feedpoint is electrically shorted and does 
nothing. 

Assuming the shield connects to the lower boom and the coax 
runs along that boom, the correct location for the balun is at the 
exit point where the cable leaves the boom and goes to the tower. 

Most certainly not at the feedpoint! A friend of mine had all sorts of 
problems with RF on the feedline until he moved his balun.
73, Tom W8JI
W8JI@contesting.com 

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