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Re: LF: DJ8WX on 8270 Hz?

To: <[email protected]>
Subject: Re: LF: DJ8WX on 8270 Hz?
From: "Markus Vester" <[email protected]>
Date: Sat, 10 Jan 2015 11:35:43 +0100
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Stefan,
 
the long dash is the DF6NM transmission on Jan 6 (see message pasted beneath). Thanks for the compliments anyway ;-)
 
73, Markus
 

From: DK7FC
Sent: Saturday, January 10, 2015 1:30 AM
Subject: LF: DJ8WX on 8270 Hz?

Hi Uwe,

It that your signal? My report is a bit late but nothing is lost.
Well, who else could it be? :-)

It is the best SNR i ever saw from you, by far!

73, Stefan
 
Sent: Tuesday, January 06, 2015 11:05 AM
Subject: VLF: 8270 carrier

The carrier has been switched off at 10:00 UT. The phase from the Rubidium-derived syntheszier was stable all the time, and the antenna current remained constant within a couple of percent. Radiated power is estimated around 10 µW, although the lower temperature of the surrounding vegetation may have helped a bit on the effective height.
 
Good signals appeared on three VLF grabbers
 
The signal in Heidelberg was good at night and went down in daylight, while OK2BVG experienced the opposite behavior. This has been seen before and is expected from the superposition of groundwave and ionospheric components at different ranges. As far as I can see, fieldstrength at Todmorden was relatively constant throughout the night, but dropped sharply around sunrise.
 
I am sorry that my LF grabber is pretty much unusable during these VLF transmissions, due to noise from partial discharges around the loading coil.
 
All the best,
Markus (DF6NM)

Sent: Tuesday, January 06, 2015 1:27 AM
To: Paul
Subject: 8270 carrier

To get a bit better idea on possible winter nighttime opportunities, I've started an unmodulated carrier on 8270 since 0:17 UT.  Antenna current is 0.31 A . Will leave it on for a couple of hours if nothing goes wrong. 
 
All the best,
Markus
 
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