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In Reply to: RE: It's WWVB, my mistake... posted by AbeCollins on March 11, 2012 at 15:23:35
60khz? That is Well Below the lower limit of US AM at 540.
The hangup with such frequencies is that even a 1/4 wave antenna is immense. Like over 3000 feet.
Best of luck stringing THAT antenna!
Too much is never enough
Follow Ups:
The transmit antenna is loaded so it doesn't have to be so long. The receiver antennas are basically just tuned circuits.
I know up in Michigan or other north/central state is a HUGE antenna farm visible from space.
It is used to transmit an ULF signal to submarines. (I guess VLF is correct?)
Anyway, here is the Wiki on such transmissions. I had NO idea of the activity at these frequencies.
As kind of a speculative aside.....Is it any wonder we haven't heard from ET? As our technology improves we go to lower and lower power with more digital information. We (Earth) has decreased the amount of RF radiated at higher powers at LOT.
So, if ET is watching Get Smart of reruns of The Lucy Show, that's gonna stop when everything goes to cable or DBS.
If other sort-of intelligent life follows the same pattern, you've got maybe 100 years of hi-intensity RF from a planet than a quick decrease. If someone is listening, they have a VERY small window of opportunity.
Too much is never enough
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