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Message-ID: <CBB7C6943E384BA2A20435712F25D0F0@JimPC>
From: "James Moritz" <james.moritz@btopenworld.com>
To: <rsgb_lf_group@blacksheep.org>
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Date: Wed, 14 Jan 2009 00:21:30 -0000
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Subject: Re: LF: WSPR beacon on 136kHz
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Dear LF Group,

Thanks for all the reports - The M0BMU WSPR beacon is still running, and 
will probably QRT at around 0100utc.

So far the reports this evening have been from (in no particular order) 
F1AFJ, GM4SLV, DF6NM, DL4YHF, F5WK, LA9BEA, F4DTL, DK6NI, G4FDD, F4EMV, 
I2PHD, G3WCB and IK1ODO. Many thanks to all - It is good to see some calls 
who are not previously "known" on LF.

I would be interested to try another 136k WSPR session during daylight - 
bearing in mind the long ground wave range on 136k, and the relatively low 
QRN during the day, I think results could be good. Perhaps this weekend.

John - your lack of trees is not such a bad thing on 136k, where they soak 
up a lot of your TX power. In the experiments I did about a year ago, I 
found that an inv L antenna that was nearly identical to the antenna I am 
using now except that it was in the middle of a field, was 24 times as 
efficient as my home antenna, which is surrounded by assorted trees and 
buildings ( it was 6 times more efficient on  500k). So you might not need a 
tall antenna to get a reasonable signal in your treeless landscape. True, I 
am also using quite high power, but then looking at the SNR figures on your 
spots, there is about 10 - 20dB margin over the minimum possible SNR for 
decoding. so you could probably get away with less power too.

Cheers, Jim Moritz
73 de M0BMU