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Date: Tue, 03 May 2011 23:10:57 +0100
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Subject: Re: LF: DJ8WX on 8970.022Hz
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Uwe Stefan Gerhard LF

Uwe's  your signal was not quite strong enough for any identification=20
here today.

Stefan, yes I compare the diurnal  noise level with other Grabbers often=
=20
and they are similar. I have been watching the noise closely lately.=20
Today was very quiet at first, the noise built up and peaked around 1400=
=20
and unusually dropped by 1800. This correlates with a lack of lightning=20
activity in northern Europe this evening. There is lightning activity in=
=20
Southern Spain and North Italy but not northern France and southern UK=20
as in the last few days.

I am looking forward to the usual wet dull spell with maybe less static=20
known in the UK as Summer time.

73 Eddie G3ZJO

On 03/05/2011 22:25, Stefan Sch=C3=A4fer wrote:
> Hello Gerhard,
>
> I am afraid it is not only due to propagation, as you say. As i saw=20
> DJ8WX's signal today and compared it to the old signal levels i got=20
> the idea that the trees and gras, which are green now(!) may increase=20
> the losses on VLF significantly. This may be the same on your QTH.=20
> Time for loop antenna experiments, which are quasi unaffected by that.=
=20
> 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 nois=
e
>> 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 antenn=
a
>> 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 tha=
t
>> "weak" now compared to some weeks ago.
>>
>> 73
>> OE3GHB
>> Gerhard
>>
>>
>>
>>
>>
>> Am Dienstag, den 03.05.2011, 21:04 +0200 schrieb Stefan Sch=C3=A4fer:
>>> 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 Sch=C3=A4fer:
>>>> 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 uwe-jannsen@kabelmail.de:
>>>>> 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
>>
>
>