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Date: Sun, 13 Sep 2009 21:35:49 +0000
From: John P-G <gm4slv@sighthound.demon.co.uk>
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Subject: Re: LF: My first WSPR spots
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Roger Lapthorn wrote:
> If you could SEE my TX,  "antenna" and ATU you would realise how amazed I am
> at this report from G3XVL. My antenna is literally 15m of low horizontal
> wire with about 2m of it vertical, a central heating ground and an ATU on
> the bedroom table made from a ferrite rod and fed with 700mW from a
> 2N3906/2N3904. This proves that 500kHz is possible with a
> *really*minimalist station. I can only imagine what will be possible
> with some
> effort on my part.


Roger!

Well done - it just shows what can be done with RF and a piece of wire....

Assuming your ERP to be around the ~mW level we might be in with a 
chance even up to Shetland, given some suitable conditions.

I've been doing some tests on 5MHz recently and have been receiving 
stations using TX powers in the milliwat, and sub-milliwatt, range.

I've received G4ZFQ using TX power of 0.3mW at a range of 1061km.

Obviously it's not fair to directly compare 5MHz and 500kHz - at least 
it shows what can be done with really low ERP.

Please leave the WSPR running overnight and let's see what turns up in 
the wee small hours.

Cheers,

John
GM4SLV