As I understand it, the reason that the quad was implemented at
HCJB was to eliminate the coronal discharge that they were
suffering on their 1/2 wave elements. Apparently this was a big
problem at their high altitude (Andes Mountains) location.
73 de Mike, W4EF.......................
----- Original Message -----
From: "Pete Smith" <n4zr@contesting.com>
To: <TOWERTALK@contesting.com>
Sent: Saturday, November 16, 2002 11:28 AM
Subject: Re: [Towertalk] Loop Gain (was LPA designs)
> At 11:28 AM 11/16/02 -0600, Jon Ogden wrote:
> >on 11/16/02 10:49 AM, Zyg Skrobanski at af4mp@mindspring.com wrote:
> >
> > > I don't think I've seen Yagi's used by any SW broadcasters.
> >
> >Probably not. It's too narrow in bandwidth and probably too directional.
> >
>
> Actually, when I lived in Taiwan in the late 1960's, there was a religious
> broadcasting station there that used a three-element tribander (modified
> for BC frequencies, I assume) to broadcast to the mainland. The quad
> parasitic array was, I believe, developed at broadcast station
> HCJB. Today, VOA et al frequently make use of curtain arrays that,
> depending on their configuration, can be very directional indeed. One of
> the other things that is (or was) on the F12 web site was N6BT's
> description of using a 21 dBi gain broadcast curtain in a DX contest.
>
>
> 73, Pete N4ZR
> Sometimes a tower is just a tower
>
>
>
>
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