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Date: Tue, 24 Apr 2007 13:52:13 +0100
From: "Andy Talbot" <andy.g4jnt@googlemail.com>
To: rsgb_lf_group@blacksheep.org
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Subject: LF: 500kHz
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I've been away from the LF scene for some time, and haven't even been
reading the postings recently, so know nothing of what is going on on 0.5MHz
.

I was looking at various bits of equipment / junk on the shelves recently
(with a view to rationalising it all and putting some of teh bits on a rally
stand or Ebay) when I realised I more than enough hardware that can be
plugged together for a very potent 500kHz station.  Viz. 200 Watt  500kHz to
40MHz linear PA, transverter and a old NDB variometer that matches my LF Tee
antenna.  (The PA in fact generates full power down to significantly lower
than 500kHz).

A quick test of the antenna at this freq indicates 23 ohm loss resistance
(it is 100 ohms at 137kHz) so with the 200W PA I suspect would be over the
allowed E.RP.

Question :
What is happening on 500kHz?  Having no interest whatsoever in CW, or
working other stations just to add up callsigns and countries, so is there
any experimentation going on; optimum data modes, propagation monitoring etc
that would make it worth applying for a NoV and doing some radio science
again?

Andy  G4JNT

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<div><br>I&#39;ve been away from the LF scene for some time, and haven&#39;t even been reading the postings recently, so know nothing of what is going on on 0.5MHz.</div>
<div>&nbsp;</div>
<div>I was looking at various bits of equipment / junk on the shelves recently (with a view to rationalising it all and putting&nbsp;some of teh bits&nbsp;on a rally stand or Ebay) when&nbsp;I realised I&nbsp;more than enough hardware&nbsp;that can be plugged together&nbsp;for&nbsp;a very&nbsp;potent 500kHz station.&nbsp; Viz. 200 Watt&nbsp; 500kHz to 40MHz linear PA, transverter and a old NDB variometer that&nbsp;matches my LF Tee antenna.&nbsp; (The PA in fact generates full power down to significantly lower than 500kHz).&nbsp;&nbsp; 
</div>
<div>&nbsp;</div>
<div>A quick test of the antenna at this freq&nbsp;indicates 23 ohm loss resistance (it is 100 ohms at 137kHz) so with the 200W PA I suspect&nbsp;would be&nbsp;over the allowed E.RP.</div>
<div>&nbsp;</div>
<div>Question :</div>
<div>What is happening on 500kHz?&nbsp; Having no interest whatsoever in CW, or working other stations just to add up callsigns and countries, so is there any experimentation going on; optimum data modes, propagation monitoring etc that would make it worth applying for a NoV and doing some radio science again?
</div>
<div>&nbsp;</div>
<div>Andy&nbsp; G4JNT</div>
<div>&nbsp;</div>

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