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LF: about guns, water pistols and dripping tabs

from [Rik Strobbe] [Permanent Link][Original]
To: "[email protected]" <[email protected]>
Subject: LF: about guns, water pistols and dripping tabs
From: Rik Strobbe <[email protected]>
Date: Thu, 21 Jan 2010 11:42:39 +0100
In-reply-to: <000b01ca9a1d$f538a620$0202a8c0@laptopcore2>
References: <[email protected]> <000b01ca9a1d$f538a620$0202a8c0@laptopcore2>
Reply-to: [email protected]
Sender: [email protected]
Eddie, Andy, Roger, all,

the nice thing about WSPR and the www.wspr.org web site is that a lot af data is available.
I copied the my spots (past 7 days) of G4JNT, G3XBM and G3ZJO from the web site and threw them in the mill to check how often I copied  at least 2 of the 3 calls in the same time slot:
I took only the night time spots as I assume that propagation then is 1 hop ionospheric and small differences in distance are less important.

* G3XBM - G3ZJO: 6 'hits', average difference = 8dB (in favor of Roger)
6 data sets is a bit low to to proper statistics, but the difference of 8dB between Roger and Eddie fits well into the claimed ERP's (1mW and 200uW = 7dB)

* G4JNT - G3XBM : 60 'hits', average difference = 15dB (in favor of Andy)
15dB difference would mean that if Roger's 1mW ERP is correct that Andy would run "only" 30mW ERP ?
But the standard dev. is 6dB, so it could be (a more realistic) 120mW as well ...

* G4JNT - G3ZJO: 6 'hits', average difference = 23dB (in favor of Andy)
Nice, this is the sum of the previous values (as iit should be ;-) )

All values are give or take some dB, but they seem to make sense.

73, Rik  ON7YD - OR7T

At 23:14 20/01/2010, you wrote:
Yeh ! Congratulations Roger.
 
Lubos you have the Water Pistol, can you now RX a tiny Dripping Tap, my QRPp 200uW ERP is on..
 
73
 
 Eddie G3ZJO
 
-----Original Message-----
From: [email protected] [ mailto:[email protected]] On Behalf Of Andy Talbot
Sent: 20 January 2010 22:01
To: [email protected]
Subject: Re: LF: G3XBM
 
Congratulations,  "water pistol"
1200km - a very comfortable margin too.
 

Andy
www.g4jnt.com

2010/1/20 Lubos OK2BVG <[email protected]>
Hello Roger, LF!
This moment is just now:

2136  -7  0.2   0.503874  0 G4JNT IO90 23

2142 -29 -0.5   0.503910  1 G3XBM JO02 0

Congratulation!

Lubos, OK2BVG, JN88KS
Windows 7: Který poèítaè je pro vás ten pravý? Dal¹í informace.
 

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