[Elecraft] something new, but not under the sun

[Jack Smith]

Five interesting patents on underground and survivable antennas (such as 
embedding the antenna in a large concrete  block):

3346864
3594798
3705407
3803616
4687445

To view or download a PDF of these patents, go to 
http://www.google.com/patents/ and enter the patent numbers.

Jack K8ZOA


On 6/12/2011 3:34 AM, Stephen Prior wrote:
> John Heys G3BDQ's book 'Practical Wire Antennas' published in 1990 by the
> RSGB describes such an underground antenna in some detail on pages 79-80.  I
> don't know whether the book is still in print or in an electronic format
> anywhere.
>
> They are very quiet on receive it seems ......
>
> 73 Stephen G4SJP
>
> On 12 June 2011 04:35, Jim Rhodes<jimk0xu at gmail.com>  wrote:
>
>> Tod K0TO one time gave a presentation of an on/under ground antenna
>> designed
>> for the military. Very interesting.
>>
>> Jim K0XU Sent from my Xoom tablet
>> On Jun 11, 2011 10:08 PM, "Tony Estep"<esteptony at gmail.com>  wrote:
>>> I was tuning idly around the 20M digital frequencies tonite when I copied
>> a
>>> fragment of a PSK transmission, wherein the guy said his antenna was
>> buried
>>> under the ground. I was sure that it had been a flukey series of garbled
>>> characters, so I waited and listened on the frequency. Sure enough, a few
>>> minutes later, he faded back in, conducting another qso, and this time
>> there
>>> was no mistake: his antenna is buried under the ground. Now that's the
>> way
>>> to outfox the nosy neighbors.
>>>
>>> good DX,
>>> Tony KT0NY
>>>
>>> --
>>> "We don't want every single college grad with mathematical aptitude to
>>> become a derivatives trader." -- Barack Obama
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