[Lowfer] 472-479 kHz

[pbunn]

Power at 600 meters is cheap and very easy. Efficient antennas are large and very expensive (very expensive - and a 1/4 wave vertical is nearly 500 feet high. Would cost well over a  million dollars or so counting the radial system. A 1000 watt amp can be built for $500.  There is no such thing as an efficient short antenna.

I have not heard the power limit for the US band but WARC allowed 5 watts EIRP. Other counties still using the band would be limited to 1 watt.

Has the 1 watt ruling been made by the FCC?

I would not think many would  receive with the transmit antenna although it would probably be more efficient  than a probe. LF is a different game. I have an excellent receiving setup with a 6' whip antenna. S/N ratio is the end game.

Pat
N4LTA
WG2XCT



-----Original Message-----
From: lowfer-bounces at mailman.qth.net [mailto:lowfer-bounces at mailman.qth.net] On Behalf Of Douglas D. Williams
Sent: Tuesday, September 25, 2012 5:44 AM
To: Discussion of the Lowfer (US, European, &amp, UK) and MedFer bands
Subject: Re: [Lowfer] 472-479 kHz

On Mon, Sep 24, 2012 at 5:45 PM, craig wasson <craig at wasson.com> wrote:

>
> I work 60M mobile - and there is some incentive to have a bad antenna
> - since power is rated in ERP.  The worse the antenna - the more power 
> you can run.



Yes, but the only power that counts is what is being radiated by the antenna as RF. So, what's the point of pumping 100 watts into an inefficient antenna when the same amount of RF could be transmitted by pumping 10 watts into a more efficient antenna? Not to mention the fact that the less efficient antenna is also likely to be much worse at receiving.



>
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