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Re: LF: M0BMU small antenna test beacon

To: [email protected]
Subject: Re: LF: M0BMU small antenna test beacon
From: "Dave Sergeant" <[email protected]>
Date: Tue, 09 Jun 2009 21:14:36 +0100
In-reply-to: <C10E0C39C85E4C0583562B56DB0056DE@JimPC>
References: <C10E0C39C85E4C0583562B56DB0056DE@JimPC>
Reply-to: [email protected]
Sender: [email protected]
Jim

The full power sequence is a solid s9 on the meter. I can hear all of 
the 5 second dashes - s8, s7,s5, s3 and s1 on meter. Rather peculiarly 
each of the dashes has long 'rounded' on and off keying edges sounding 
like deep QSB - but is not, it is on the transmission... The keying of 
beacon itself is a little soft but not so severe. The lowest power tone 
is just above my noise level - 30dB down on 100mw = 0.1mW?.

In Bracknell IO91PJ

73 Dave G3YMC

On 9 Jun 2009 at 20:48, James Moritz wrote:

> Dear LF Group,
> 
> As art of continuing investigations into antennas, grounds, etc., I am
> running a beacon at the moment on 503.5kHz - I am testing a small "/P"
> antenna similar to what G3CWI proposed to use a couple of weeks back. It
> is a 9m high "umbrella" with 4 x 5m long top loading wires sloping at
> about 45degrees. Ground system is 4 x 20m radial wires.
> 
> The beacon is transmitting an 8wpm CW identifier, followed by five 5
> second dashes at reducing power levels in steps of 6dB. The maximum ERP
> is somewhere in the region of 100mW ERP. The sequence repeats every 2
> mins roughly.
> 
> I'll leave it running until after dark at least - any reports would be
> very welcome.
> 
> Cheers, Jim Moritz
> 73 de M0BMU 
> 
> 


http://www.davesergeant.com



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