[Lowfer] Beverages on LF?

[jrusgrove at comcast.net]

Alan

Glad to provide a 'muse'.

The ground conductivity for this area, according to the CCIR maps, is 1 - 2 ms/m ... which probably 
qualifies as poor ground. My source for info on Beverage antennas has been Laport and Terman and 
both indicate that the antenna works best over poor ground and performance deteriorates over good 
ground. Unfortunately neither present antenna pattern plots over different ground conductivity soils 
so we can see the performance tradeoffs. Have you seen such plots? If so, what is soil conductivity 
level above which one wouldn't want to install a beverage?

Jay






----- Original Message ----- 
From: "Alan Melia" <alan.melia at btinternet.com>
To: <lowfer at mailman.qth.net>
Sent: Monday, September 13, 2010 12:17 PM
Subject: [Lowfer] Beverages on LF?


> Hi Jay, once again beverages dont work everywhere ....they do really require
> poor ground to operate well.
>
> Having a muse about Jays's comments it occurs to me that the Beverage is a
> travelling-wave antenna so is not resonant. If any of its directional
> characteristics depend on it length then surely it is not acting as a true
> Beverage ??
>
> Finbar has has success with a low long antenna (900feet) on 136 and NDB
> frequencies though once again his was mounted on the sea shore so not over
> poor ground.
>
> Alan G3NYK
>
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