[Lowfer] Black Hole Antenna

[John RABSON]

Hi Zack,

Did you get anywhere with this?

73
John F5VLF

*********** REPLY SEPARATOR  ***********

On 27/11/2007 at 23:10 Zack Widup wrote:

>Hi All,
>
>I was wondering if any of you have built the so-called "Black Hole 
>antenna" for lowfer work.  I know quite a few of the people at the ULF-ELF 
>group I'm on are using them.
>
>The antenna is based mainly on the works of John F. Sutton of NASA and a 
>paper he wrote.  It is also described in US patent 5,296,866.
>
>I'm interested in using this antenna for an application in the 100 kHz to 
>1 MHz range with ferrite bar antennas. I have a couple questions about it. 
>For one, does the feedback loop use the same number of turns as the search 
>coil?  And what is the best way to electrostatically shield the two 
>windings?
>
>73, Zack W9SZ
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