[Elecraft] K3S ELF 10KHz

[Ron D'Eau Claire]

The Jim Creek antenna facility is amazing - a series of over mile long wires
(cables) for the radiator strung from mountain to mountain across a valley
being fed with IIRC a megawatt of VLF RF. 

73, Ron AC7AC

-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Mike
Morrow
Sent: Thursday, March 23, 2017 3:04 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] K3S ELF 10KHz

I didn't understand the reference to audio either.

When I on the crew of a US ballistic missile submarine more than 40 years
ago, our main communications receivers were AN/BRR-3 units whose full
frequency range was only 14 to 30 kHz.  These received signals from coastal
stations operating at megawatt output levels, but there was no one near such
a station with his ear drums damaged by or even sensitive to the station's
continuous output.  :-)

Anyone can listen to such signals as they exist today.  I'm not sure what
the point would be...everything down there is very deeply encrypted.

Mike / KK5F

------------------------------

>> Wait a second, there's a big difference between a sound pressure wave 
>> and an electromagnetic wave at 10-kHz...

-------------------------------

> Receivers THAT I AM AWARE OF begin coverage at 15 khz.  Used to listen 
> to
> 16 khz from GBR in England on an RAL when lived in Florida.
>
> After all, 10 khz -is- audio.
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