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Old December 20th 05, 05:32 PM posted to rec.radio.shortwave
Ron Hardin
 
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Default Kiwa MW Air-Core Loop Antenna {In-the-News} FS / FA

It's a great device and I'm happy to own one ; but you can do better
receptionwise with a couple DA100E active whips combined in an ANC-4
(total new, about $600) ; or substitute a Wellbrook ALA1530 for one of the
whips and you can co-locate the whip and the loop, still combining them
in the ANC-4. The British pound though makes that more expensive today.

Just in case somebody is pining for great MW reception and cursing the luck
that you can't get the Kiwa MW loop any longer.

Separate the whips by 125' or so.

The ANC-4 lets you steer the pair of antennas from one endfire to the other,
with a null that starts in a closed V at endfire (= in the plane of the loop,
in the case of the loop+whip ; and = the line of the whips, in the case of
two whips ) to an opened-V line at broadside, to a closed-V line at the other
endfire.

The phase alone would do it except you have to keep rebalancing the gain
at each angle, so it's really a two dimensional adjustment to null something ;
just as, with the Kiwa loop, you have to adjust azimuth and elevation both.

--
Ron Hardin


On the internet, nobody knows you're a jerk.