[Lowfer] Ashlock loop antenna articles site

[Steve Ratzlaff]

This site has the two Ashlock vertical loop artices; this was posted to the 
qrp-l list. Note the site will be down temporarily if there's any heavy 
traffic. I can also forward the articles to anyone needing them.
http://www.geocities.com/mike_staines/bill/

Steve AA7U
NE Oregon
----- Original Message ----- 
From: "Mike WE0H" <we0h at yahoo.com>
To: "Discussion of the Lowfer (US, European, &amp; UK) and MedFer bands" 
<lowfer at mailman.qth.net>
Sent: Thursday, May 08, 2008 1:03 AM
Subject: Re: [Lowfer] Longwave Antenna Question


> Does anyone have Bill's articles or know where they may be online? I can't 
> find where I put them around here.
>
> Thanks much,
> Mike
> WE0H
>
>
> John Andrews wrote:
>> Andy,
>>
>> A vertical loop, supported either by towers or trees, works fairly well. 
>> That's all that I have used for either TAG or the various LF/MF 
>> experimental operations. My site doesn't lend itself well to "Marconi" or 
>> similar antennas -- no towers, and the available trees are along the back 
>> line of the property. The top wire and downlead would be buried in the 
>> trees.
>>
>> A horizontal loop will help earthworms over a large area to survive a 
>> really cold winter. Given the part of the country you live in, this 
>> wouldn't be much of a service! <g> Seriously, the idea has been tried, 
>> and it doesn't work, as even with the horrible ground conductivity up 
>> here in New England, the signal is effectively short-circuited in the 
>> ground. You're welcome to try, but you will be very discouraged.
>>
>> The important things with a vertical loop are to maximize the area, and 
>> minimize long, low runs parallel to the ground. That would tend to argue 
>> against the triangular configuration with the high point in the middle, 
>> but anything is better than no antenna at all. The long, low concept will 
>> produce a high loss resistance which limits your antenna current.
>>
>> If you haven't done so already, take a look through Bill Ashlock's 
>> transmit loop articles. The links I have to them have gone stale, but 
>> maybe someone else can provide the correct ones.
>>
>> John A.
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