My point was that with one antenna you could have both angles available. The
important thing is having the other station hear you and if you cover a
wider range of angles you automatically have better odds.
There is nothing that says the path is 100% reciprocal so what you hear may
be quite different at the other end.
Carl
KM1H
----- Original Message -----
From: "Dave Mueller" <daven2nl@gmail.com>
To: <topband@contesting.com>
Sent: Sunday, October 16, 2011 8:14 PM
Subject: Re: Topband: high take-off angle
> When designing a low band antenna for my Guam QTH, I purposely went
> through great trouble to make a true "TEE" vertical to avoid having an
> inverted L on 160. I figured that being limited to 55ft of vertical
> height, the rest of the "L" would present a significant higher angle
> horizontally polarized component. I am located 1,500 miles from Japan
> and 7,000 miles from both Eastern North America and Western Europe. I
> wanted to maximize low angle takeoff and efficiency by using top loading
> and a good radial field, and to keep the radiating portion centered as
> much as possible over my radials.
>
> I understand that high angle propagation does occur on 160m, however low
> angle generally rules. With room for only one transmit antenna, I felt
> it was more important to be prepared for the 90% scenario, instead of
> those rare occasions when high angle takeoff is a factor. I think those
> who worked me for a new one and those who still need Guam on 160m will
> thank me for the decision I made. By all means, if you have room for
> more than one antenna, a second high angle radiator could be the trick
> to completing some QSOs. However, if you only have room for one, I'd
> aim to have a radiator as high in efficiency with as low an angle of
> takeoff as possible. This is what you get with a vertical over salt
> water, usually considered "the ideal situation".
>
> 73, Dave KH2/N2NL
>
> _______________________________________________
> UR RST IS ... ... ..9 QSB QSB - hw? BK
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1411 / Virus Database: 1522/3957 - Release Date: 10/17/11
>
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
|