[Elecraft] 6 meter beam - OT

[Lew Phelps K6LMP]

Great construction notes, Dave! 

However, I don't see the advantage of the longer boom and fourth element required with your design. With the 3 element design I described, free space gain (as modeled with cocoaNEC) is virtually the same as your four element design, while boom length is only about 8 feet vs. your 12 feet, and your best SWR is 1.26:1, compared with 1.02:1 for the three element antenna. The only appreciable benefit I see to the longer boom is a better f/b ratio (about 27 dB vs. about 17 for the smaller antenna).

Lew K6LMP

On Mar 18, 2010, at 10:55 AM, Dave, G4AON wrote:
[snip]
> --------------------
> Or a four element, see my web pages for the dimensions of a portable 4 
> element quad http://www.astromag.co.uk/quad/