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Re: Topband: [Bulk] Re: Phased short vertical receive antenna system

To: "Top Band Contesting" <topband@contesting.com>
Subject: Re: Topband: [Bulk] Re: Phased short vertical receive antenna system
From: "Tom W8JI" <w8ji@w8ji.com>
Reply-to: Tom W8JI <w8ji@w8ji.com>
Date: Wed, 19 Nov 2014 12:53:53 -0500
List-post: <topband@contesting.com">mailto:topband@contesting.com>
Good info, Grant - the sort of concise "here's what I did that works" info needed.

72, Jim R. K9JWV


Jim (and all),

Almost always, the warnings and guidelines for various systems depend on how conservative the designer or manual writer is. Things should never be taken as being "cast in concrete".

Part of this occurs because "works" is always subjective, what one person is happy with and thinks he set the world on fire with is never the same as what someone else is happy with.

Part of this is because installations have different things in and around the antenna that might bothering the antenna system. No two systems, unless they are out in the open over similar earth, act exactly the same.

This is why some companies sell 1/4 wave verticals, or worse 43 ft verticals, and promise the world with no radials or minimal radials, and why other companies might tell customers them need more radials. It isn't that one antenna system of a similar style is necessarily less critical. The real reason is often that whoever wrote the instructions or advertising was more liberal or more conservative in claims or warnings.

There was a remark a week ago about an antenna system not being supposed to work with a house in the middle of the array. Whether a house bothered the array or not actually depended far more on the particular house and what is inside the house than it does on the array.

Unless a system is over open clear flat soil of a given type, bad things might sometimes happen. Since no one ever knows how a location or things in the location affect an installation, guidelines might wind up too conservative. Some guidelines can be far too loose.

I can say this, the DXE stuff is absolutely better...installation being equal. That doesn't mean it is always noticeable, or that something else won't work. Being better doesn't mean something else won't work almost the same, and it doesn't mean it will work the same. It just means better.

My K3 is far better than my Yaesu stuff for what I do. Doesn't mean I always notice it, or that someone else might ever notice it, and it doesn't mean someone else just hates Elecraft and loves the same Yaesu's I have. :)

73 Tom
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