Project ELF is located in northern Wisconsin and Michigan's Upper Penninsula.
It is capable of producing signals from 30 to 300 Hz.
http://www.oldradio.com/archives/jurassic/ELF.doc
73, de Mike, K9UW
Amherst, WI
---------- Original Message ----------------------------------
From: "John T. Fleming" <W3GQJ@attbi.com>
Reply-To: tentec@contesting.com
To: <tentec@contesting.com>
Date: Mon, 5 May 2003 22:33:43 -0500
>Tom,
>
>Isn't here also a 10 KHz antenna system in the upper peninsula of Michigan?
>I seem to remember reading about it being built years ago.
>
>73,
>John
>
>PS As a kid years ago when I had an SX-99 receiver, I had door bell wire
>running around my bedroom and hooked to the external speaker connection. I
>had a set of high impedance headphones and a coil of wire that fit on my
>head like a halo. I think it was maybe #21 wire. I forget how many turns
>there were, but it was about a quarter inch of coil after I wrapped it with
>electrical tape. I could then listen to the radio while I cut the grass in
>the back yard. Is that RF or AF? I assume it was RF since AF is usually
>related to moving the air for the ear to hear. Fuel for the fire. :-)
>
>
>-----Original Message-----
>From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
>On Behalf Of Thomas Jednacz
>Sent: Monday, May 05, 2003 10:11 PM
>To: tentec@contesting.com
>Subject: RE: [TenTec] Hello Orion Users
>
>Hello Bill and all - Bill you are correct. The Navy uses just such a system
>to communicate with the subs around the world. You should see the antennas
>around San Diego. Wow!
>
>Tom, W7QF
>
>-----Original Message-----
>From: tentec-bounces@contesting.com
>[mailto:tentec-bounces@contesting.com]On Behalf Of WILLIAM MANSEY;
>WA2PVK
>Sent: Monday, May 05, 2003 9:20 PM
>To: tentec@contesting.com
>Subject: Re: [TenTec] Hello Orion Users
>
>
>Hello Carl and everyone,
> This is an interesting subject and one that I have had heated
>discussions over. (IE: Arguments!)
> When is RF "RF" and not "AF"? If one were to build a transmitter, of
>"conventional" design - BUT on a scale that would operate at 10KHz. and
>connected it to "The Mother of all Antennas" it would radiate a signal just
>like any other transmitter is supposed to be doing. NOW for the "fun"
>part - - - If you were in the near vicinity of this monstrosity would you
>hear anything? I say NO because it is RF. (if you were real close to the
>transmitter you might hear a signal but only if the RF caused mechanical
>vibrations in the coils and/or other components.
> Someone PLEASE correct me if I am wrong. I am used to that and can
>handle being corrected. I remember that because I was wrong ONCE before!
>:-)
> I am not trying to stir up any trouble. I just am seeking clarification
>of this interesting subject. I just think that RF applies to
>electromagnetic energy travelling at the speed of light.
> The bottom line is, to me, that the DSP (and the rest of the attached
>Orion) works fantastically well! 73, Bill
>wa2pvk@verizon.net
>
>
>---
>Outgoing mail is certified Virus Free.
>Checked by AVG anti-virus system (http://www.grisoft.com).
To: <tentec@contesting.com>
>Version: 6.0.474 / Virus Database: 272 - Release Date: 4/18/2003
>
>_______________________________________________
>TenTec mailing list
>TenTec@contesting.com
>http://lists.contesting.com/mailman/listinfo/tentec
>
>_______________________________________________
>TenTec mailing list
>TenTec@contesting.com
>http://lists.contesting.com/mailman/listinfo/tentec
>
>
>
>_______________________________________________
>TenTec mailing list
>TenTec@contesting.com
>http://lists.contesting.com/mailman/listinfo/tentec
>
|