Re: [amsat-bb] GRRRRRRRRRRR!

[John Mock <kd6pag@xxxxxxx>]

> To this end, several months ago, I e-mailed Arrow asking for a polar plot of
> the antenna's power emissions.  The response was "we are too busy filling
> orders to run the plot".  A typical Yagi does have a significant lobe at 180
> degrees..

I'm not a NEC expert and i know there may be inadequacies in how this has been
fed.  This uses dimensions supplied by KI0AG (*thank you*!) and these may not
exactly correspond to the production model.  However, it should give you a vague
idea of its pattern in absence of better information:

    http://www.qsl.net/kd6pag/nec/dual-crossed-3-5el.html

At 2 meters, it doesn't look bad, but i still wouldn't want to use it hand-held
much above 5 or 10 watts.  When used a comparable antenna with a '736 to work 
the Fuji birds, i mounted in on a tripod and operated from at least five feet 
away.  It has less front-to-back ratio at 2 meters (but better F/B at 70cm 
where it counts for J-FM [assuming my model was decent enough for that]).
That was for early experiments, a copy of that antenna is now roof-mounted 
and the hand-held model is used strictly for QRP operation.

                     73's and good luck!

                          -- KD6PAG
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