Uwe Stefan Gerhard LF
Uwe's your signal was not quite strong enough for any identification
here today.
Stefan, yes I compare the diurnal noise level with other Grabbers often
and they are similar. I have been watching the noise closely lately.
Today was very quiet at first, the noise built up and peaked around 1400
and unusually dropped by 1800. This correlates with a lack of lightning
activity in northern Europe this evening. There is lightning activity in
Southern Spain and North Italy but not northern France and southern UK
as in the last few days.
I am looking forward to the usual wet dull spell with maybe less static
known in the UK as Summer time.
73 Eddie G3ZJO
On 03/05/2011 22:25, Stefan Schäfer wrote:
Hello Gerhard,
I am afraid it is not only due to propagation, as you say. As i saw
DJ8WX's signal today and compared it to the old signal levels i got
the idea that the trees and gras, which are green now(!) may increase
the losses on VLF significantly. This may be the same on your QTH.
Time for loop antenna experiments, which are quasi unaffected by that.
Rather local tests but Scott may show us some interesting work soon :-)
73, Stefan/DK7FC
Am 03.05.2011 21:58, schrieb Gerhard Hickl:
Stefan, VLF!
In general, I noticed decreasing conditions on VLF during the past
weeks. This has on one hand to do with increasing noise and longer noise
periods but this alone can not explain the bad propagation.
My last transmission, about two weeks ago was hardly copied by your
grabber, while during winter it was not a problem to make a fat trace
with the same setup. Ossi experienced the same.
I do not plan transmissions on VLF for now, except with the kite antenna
which will more than compensate the bad propagation.
This only reflects my "feeling" without any proof or measurement
results.
So out of this feeling, for me it's no surprise that Uwes signal is that
"weak" now compared to some weeks ago.
73
OE3GHB
Gerhard
Am Dienstag, den 03.05.2011, 21:04 +0200 schrieb Stefan Schäfer:
Uwe, VLF,
Today you are visible in 60000 and traces in 6000 but the QRN
decreases the SNR significantly (i didn't change the brightness slider
since the winther time!).
73, Stefan/DK7FC
Am 02.05.2011 17:21, schrieb Stefan Schäfer:
Hello Uwe,
Nice to hear from you again. Yes, no trace here. Your last
transmission of March, 29 is still visible and if i compare the
signal levels (i.e. colors) and substract 3 dB you should be visible
anyway, but this may be due to the effect of noise blanking...
A grabber in north DL would be useful but who can arrange that? :-)
73, Stefan/DK7FC
Am 02.05.2011 15:34, schrieb [email protected]:
Hi all,
my stn transmitted a carrier yesterday 0000 -1430UTC and today
0730 - 1309UTC.
abt half the output power as some weeks ago.
the only stn out of eleven grabbers that received the sign was
Todmorden.
my stn will be back on the air when todays strong wind calms down
agn.
GL
UweIdj8wx
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