[Elecraft] EFHW
Brian D
groups at planet3.freeuk.co.uk
Mon Feb 13 19:22:08 EST 2017
1530KHz is about 200m wavelength so 2 half waves in phase would be about
200m tall, approx 650'
Fred Jensen <k6dgw at foothill.net> wrote:
> Well, the KFBK Franklin is two vertical 180 deg co-linear elements center
> fed [in-phase, I think], so I guess it would be about 1,600 ft [almost 500
> m]. A couple of the TV towers in Walnut Grove down in the Delta are 2,000
> ft [600 m], but they're not center fed. [:-) I think most "half-wave" BC
> verticals are close to but not exactly 180 deg. IIRC, KFI [640 KHz] in Los
> Angeles has a 725 ft tower which is almost exactly 180 deg but has a
> capacity hat that extends it to an effective 195 deg or so. When you drive
> by it on I-5, it is one very tall tower.
>
--
Brian Duffell G3VGZ Yarm England
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