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RE: LF: VLF - G3XIZ - QRT

To: <[email protected]>
Subject: RE: LF: VLF - G3XIZ - QRT
From: "Dave G3WCB." <[email protected]>
Date: Mon, 27 Dec 2010 12:51:51 -0000
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Reply-to: [email protected]
Sender: [email protected]
Graham,
 
see Markus' post below:-
 
Sent: Saturday, October 09, 2010 8:09 PM
Subject: Re: LF: Re: Transmitting on 8969.998 Hz

Thanks a lot Stefan for this nice confirmation! I'm quite amazed that it did work so well. And congratulations to you - as they say, with QRP all the hard work is being done on the receiving side! And I recall our conversation not long ago, when the two of us half-jokingly calculated that we could probably work each other at one bit a day ;-)
 
The amazing thing is that virtually everybody can do this. For transmitting, all you need is an average LF backyard marconi, or a strapped 80 m dipole with reasonable insulation. We actually live on a fairly small plot, and I have 42 m of wire up at about 7m effective height. A power of 80 W gives around 0.28 A (ie. 21 kV antenna voltage). Thanks to Spectrum Lab, accurate GPS or MSK stabilisation has become almost straightforward.
 
I have stopped the transmitter now at 18:00, as I do not dare to let it run through the night. If conditions allow, I will try to add another dash tomorrow ;-)
 
Best regards,
Markus (DF6NM)
 
-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of Graham
Sent: 27 December 2010 12:45
To: [email protected]
Subject: Re: LF: VLF - G3XIZ - QRT

What was the  Ae  / power set  up used by  Markus then ?

Sent: Monday, December 27, 2010 12:34 PM
Subject: RE: LF: VLF - G3XIZ - QRT

Chris,
 
Tough luck with the Loading Coil. I'm really surprised that you didn't make 11 km...Markus managed 20km plus in his tests in October.
 
Nil desperandum!
 
73, Dave G3WCB
-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of Andy Talbot
Sent: 27 December 2010 12:29
To: [email protected]
Subject: Re: LF: VLF - G3XIZ - QRT

At what time  did you turn off?
 
Take a look at http://www.g4jnt.com/DownLoad/XIZ_1.jpg  where there is just the faintest line at the right frequency - looking in a bandwidth of 0.05Hz.
 
(The other point labelled is wher ei inject a frequency 10Hz higher at the start to check frequency cal)
 
If it is genuine, and not just a spuron, then QRSS 60 would probably show results.
 
Its still running to see if that just-possible line has now clearly gone.
 
Andy
 
 
 


 
On 27 December 2010 12:20, Chris Osborn <[email protected]> wrote:
Thanks for your efforts chaps.

I had definite QRSS-3 confirmation from Dennis M0JXM at 1.5 km but Pete M0FMT at 11 km
had no copy.

I have developed an intermittent short-circuit problem with the loading coil and will QRT now.

I'll notify via the reflector when transmitting again.

73 Chris XIZ




From: James Moritz <[email protected]>
To: [email protected]
Sent: Mon, 27 December, 2010 11:44:17
Subject: LF: Re: VLF - G3XIZ

Dear Chris, LF Group,

The VLF RX has been running since 1130 - Nothing seen yet.

Cheers, Jim Moritz
73 de M0BMU






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