[UK-CONTEST] CQWW CW QRP 7MHz

[Clive GM3POI]

Gordon, I don't think that comparison is valid as 
their are such major variations in propagation 
between your two locations. The only way to do it 
would have been for Barry to have had two Tx antennas 
that did not interact and test them both A/B. 73 
Clive GM3POI ( all antennas work some better than 
others)

----- Original Message ----- 
From: "Gordon Brown" <gordonbrowns at btinternet.com>
To: <uk-contest at contesting.com>
Sent: Tuesday, November 30, 2010 3:13 PM
Subject: Re: [UK-CONTEST] CQWW CW QRP 7MHz


I guess we are all looking at ways of improving our 
signal and I was so
impressed by the GM3YEH QRP score that I thought I 
would have a look at the half
square antenna he uses. It seems to be a pair of top 
fed quarter wave verticals
fed in phase and some people claim it gives up to 4dB 
gain over a dipole at low
radiation angles. My next step was to see how Barry's 
signal compared to mine
on the air and I used reverse skimmer to get the 
following results -
Rx Stn Tx Stn freq S/N speed
time date
ES5PC GM3YEH 7012.6 CQ 23 dB 25 wpm 1048 28
ES5PC G1N 7010.0 CQ 24 dB 25 wpm 1050 28
DL2CC GM3YEH 7012.7 CQ 20 dB 26 wpm 1051 28
DL2CC G1N 7010.1 CQ 26 dB 25 wpm 1052 28
ES5PC GM3YEH 7012.7 CQ 14 dB 25 wpm 1059 28
ES5PC G1N 7010.0 CQ 24 dB 25 wpm 1100 28

These were the only anywhere near meaningful 
comparisons I could find
I was running 110 watts to a dipole which should give 
me about 16dB over 5 watts
and give him 4dB with the half square over my dipole 
making an overall
difference of 12 dB in my favour. I guess I don't 
have enough information to
allow for the different paths but it looks like the 
GM3YEH half square is much
better than I thought it was.
73
Gordon.

----- Original Message ----- 
From: "GM3YEH" <gm3yeh at googlemail.com>
To: <uk-contest at contesting.com>
Sent: Monday, November 29, 2010 8:57 PM
Subject: [UK-CONTEST] CQWW CW QRP 7MHz


> I've never been much of a QRP fan, but I decided to 
> give it a go for the
> 2010 RSGB 80m sprint series and was astonished with 
> the results. This
> encouraged me to think about a QRP effort for this 
> year's CQWW CW. I only
> use wire antennas and can just get one up in my 
> garden at a time so I
> decided on something with a bit of gain for a 
> single band 40m entry. A
> half
> square was decided on with main lobes towards the 
> east and west. I got it
> up
> and tested just before the snow started. One of the 
> most impressive
> things
> I noticed over the weekend was the high proportion 
> of Ws who managed to
> copy
> my tiny wee 5W signal on the first call - lots of 
> those guys have really
> great ears. A lot of time was spent on repeats and 
> my callsign was
> regularly mis-copied as GM3YES - which is a real 
> pain in the neck after
> the
> other guy gives his TU and I need to call him again 
> with the correction.
> Although I probably wouldn't be patient enough to 
> use QRP all the time, it
> was a nice change - especially getting into VK! I 
> didn't work GM or GI.
>
> Points - 127,568
> QSOs - 721
> Zones - 21
> Countries - 91
>
> 73 de Barry GM3YEH.
> _______________________________________________
> UK-Contest mailing list
> UK-Contest at contesting.com
> http://lists.contesting.com/mailman/listinfo/uk-contest

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