Re: LF: My first WSPR spots

[Roger Lapthorn <rogerlapthorn@gmail.com>]

Yes, I'll leave the WSPR signal running tonight John. 

So far only G6ALB and G3XVL have reported the signal, but maybe the noise floor will drop during the night and a few more might discern the tiny signal.  I am enjoying this SO much and wish I'd done this much sooner, but I only discovered WSPR a few weeks ago. 

73s
Roger G3XBM

2009/9/13 John P-G <gm4slv@sighthound.demon.co.uk>

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

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