|
Stefan,
the long dash is the DF6NM
transmission on Jan 6 (see message pasted beneath). Thanks for the
compliments anyway ;-)
73, Markus
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
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
| 