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Yes . may be the best idea !
Good luck with the race to 8 hihi
All the best for 2014
73-Graham
G0NBD
Sent: Tuesday, December 31, 2013 4:42 PM
Subject: Re: Re: Re: VLF: Uwe Opera-4H
Hi all,
my home is crowded by people I don’t know partly.
I think it is necessary to stop the transmission
before they make acquaintance with Mr. Tessla.
So I switch off the TX after this sequence,
More next year,
GL
Uwe/dj8wx
Von: [email protected]Gesendet:
31.12.2013 16:42 An: [email protected]Betreff:
Re: Re: VLF: Uwe Opera-4H
Hi
Wolf, hoping you will have success. I think it all depends on usisng a
good (resonant?) aerial. GL and hny Uwe/dj8wx
Von: [email protected]Gesendet: 31.12.2013 13:20 An:
[email protected]Betreff: Re: VLF: Uwe Opera-4H
Hello Uwe, At least, the dominant peak in the
'long-term' average spectrum (collected between last midnight and this morning)
was right on spot, precisely on your frequency. I was using GBZ as frequency
reference on the netbook. Will leave it running until next
year.. Thanks and GL, Wolf . Am 31.12.2013 13:07,
schrieb [email protected]:
Hi Peter, Graham and Markus,
when Im really dreaming the Fade becomes zero. Pse see:
http://dj8wx-dl.de/opera5.jpg
the TX is still on the air. Pse try your
best,
GL and hny
Uwe/dj8wx
Von: [email protected]Gesendet:
31.12.2013 11:43 An: [email protected]Betreff:
Re: VLF: Uwe Opera-4H
Unfortunately no copy from Uwe, here in JO42FD
using the broadband VLF E-field receiver at DF0WD and 0.5 mHz FFT bin
width..
Hny and cul,
Wolf.
Am 31.12.2013 10:18,
schrieb PA1SDB, Peter:
Uwe,
This message (below) came in my
mail box at 08:42 UTC today (31-Dec-13)
73's Peter..
----- Original Message -----
Sent: Monday, December 30,
2013 2:46 PM
Subject: Re: Re: VLF: Uwe
Opera-4H
HI Peter,
I changed the TX QRG to 8912.5Hz running SpecLab in
Op-4H (ASK0) mode and made a first test with positive result.
the RX was located in 3km distance - Opera v.1.5.0 , RX aerial a
10m wire connected to the soundcard.
TX output pwr about 1W. pse see:
http://dj8wx-dl.de/opera3.jpg
I think we should have a try as you are my nearest
station rxing VLF.
Now Im increasing the PA output pwr to 500Wrms.
GL
Uwe/dj8wx
Von: [email protected]Gesendet:
29.12.2013 09:45 An: [email protected]Betreff: Re:
VLF: Uwe Opera-4H
Hello Uwe, Markus,
VLF
Nothing was seen or detected here
from your transmission in OPERA mode either..
No recognizable trace at
all.
While you're continuous
unmodulated signal almost overloads my soundcard input.
73's Peter - PA1SDB
----- Original Message -----
Sent: Saturday, December
28, 2013 9:08 PM
Subject: Re: VLF: Uwe
Opera-4H
yes Markus, I have had the screen showing the SecLab
components in my focus whilst doing other jobs - for
hours.
Now the carrier only mode is on the air.
Until next test
GL
Uwe/dj8wx
Von: [email protected]Gesendet:
28.12.2013 19:07 An: [email protected]Betreff: VLF:
Uwe Opera-4H
Uwe,
sorry, nothing
was seen or detected here from your transmission today. Not a
trace. Der erste
Versuch ist meist nicht genuch (Didi
Drahtlos).
Yes I noticed the
good trace on Paul Nicholson's spectrogram http://abelian.org/vlf/fbins.shtml#p=1388246400&b=080&s=sp.
Just look at it
the other way round: You did send a long carrier, only with some short
interruptions. But the gaps were so short that the spectrum didn't
notice them ;-)
More seriously:
Compared to a
continuous carrier, with 50% duty cycle the
carrier component is still there but 6 db down (half average voltage).
In terms of power, on average you are spending 50% of the
power. 25% (-6 dB) goes to the central carrier, and the
other 25% into the AM sidebands carrying the
message.
What I
find strange is that the spectrogram trace seems to have
jumped 28 mHz low, once near the beginning and again for
an hour around 14:30. Are you sure that your samplerate correction
had been engaged without interruption?
Best
73,
Markus
(DF6NM)
Sent: Saturday, December 28, 2013 3:05 PM
Subject: Re: Re: LF: Sending Opera with
SpecLab
OK.,
Markus, but the Todmorden grabber shows the signs.its a surprise for me.
I didnt expect it samples such relative short
signs. GL Uwe/dj8wx tks for the correction.
Von: [email protected]Gesendet:
28.12.2013 12:47 An: [email protected]Betreff: Re:
LF: Sending Opera with SpecLab
Uwe,
good news!
I'm watching and searching ;-)
Background noise
seems to be a few dB higher than the last couple of days, but we'll
see what's possible anyway. Unfortunately the OK2BVG
grabber website appears to be down at the moment.
Good
luck!
73, Markus
(DF6NM)
PS: In my
original mail, the Op-8 line in the speed table erroneously
contained an entry for Op-4. This has been corrected
beneath.
Sent: Saturday, December 28, 2013 12:14 PM
Subject: LF: Sending Opera with
SpecLab
Hi
all, the PA has been switched on. the next txt block will start
now. GL Uwe/dj8wx
Von: [email protected]Gesendet:
27.12.2013 15:47 An: [email protected]Betreff: Re:
Re: LF: Sending Opera with SpecLab
Hi Markus, Wolf, Stefan, Peter es all, tks for the
advice, Markus
now SpecLab is beaconing in mode Op-4H on
8969.99Hz
the PA is off until it is dry outside.
I keep your proposal txing btwn 0700 and 1400MEZ in mind,
Markus.
GL
Uwe/dj8wx/dj8CAT
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