[TowerTalk] Yagi Antennas

[Jim Lux]

On 9/18/11 12:41 PM, Pete Raymond wrote:
>       I am wondering if anyone knows of any studies done with like Yagi
> antennas, one with elements insulated from the boom, and one with elements
> grounded to the boom, and how their respective performances compared.
>
>       73 Pete N4KW
>

There's a huge amount of work on this in the VHF/UHF world

 From a theoretical standpoint (and borne out by practical experience), 
there's no real difference, assuming the design accounted for whether 
the boom was insulated or not.  It's really all about the currents phase 
and magnitude in the elements and their spacing, and for the most part, 
you can get the same kind of things either insulated or not.

That doesn't mean the design will be identical, or that there is some 
simple automatic conversion (e.g. add 1" for insulated elements)