Hi Paul
Try a real QSO XBAND IE
You TX on 137 Khz using JT9, QRSS, DFCW etc and when I observe your signal
I will reply on 472.5, 1820, or any other freq 7030 Khz
A QSO in real time
This would be more exciting than BEACON mode
This is what I used to do in the old days before the USA had a permit for LF
es MF . I would TX on 137 Khz and RX 1830 or 7030 Khz and it worked well.
de MAL/G3KEV
-----Original Message-----
From: N1BUG
Sent: Wednesday, March 21, 2018 8:34 PM
To: [email protected]
Subject: Re: LF: Re: 2200m Trans-Atlantic QSO dream...
Hi Stefan,
I will be watching the DF6NM grabber along with several others tonight.
I need a better receive antenna for Europe, but I can only build one
this year (it also has to be low cost). I have to make some decision
about what it should be.
When I have high static it usually causes some smearing of the
signal on the spectrogram. I didn't see any of that on Jay's
capture. It could be just some problem that is created by my
receiver. I will have to investigate it.
I will stay with DFCW60 tonight, but might change to 90 in next
night(s).
73,
Paul
On 03/21/2018 02:01 PM, DK7FC wrote:
Hi Paul,
Jay was (and is!?) using a cardioid antenna poiting to the east for that
reception, which is certainly a big advantage.
But how high or low the noise has been, you don't see it on that
spectrogram. A dark noise background does not indicate low QRN, it is
just the setting of the brightness slider in SpecLab.
Unfortunately i'm QRMing my own LF RX due to my regular VLF
transmissions. But the DF6NM grabber is just 175 km more distant and is
active at http://www.df6nm.de/grabber/Grabber.htm
73, GL, Stefan
PS: Using DFCW-90 may be a bit more easy to interprete on the
spectrograms. My transmission was in DFCW-90.
Am 21.03.2018 15:45, schrieb N1BUG:
Wow, Stefan and Jay, that is amazing. I get an impression Jay's
static level was fairly low at the time of that capture. Mine is
never low in March, which suggests my receive antenna may be not so
good. I believe Jay was using directional antennas. I just have a
low noise vertical.
I am setting up to transmit DFCW tonight. My intended target is
DFCW60 on 137.779 but final details will not be available for a few
hours. I will begin testing now. When I am sure I know what I am
doing and have all settings correct, I will make another announcement.
73,
Paul
On 03/21/2018 10:06 AM, DK7FC wrote:
PS: This capture was taken on Jay's side of course.
And just to get an impression, with 25 dB SNR in 28 mHz you can
transfer a 100 character EbNaut message in 5 minutes and have a
spare 6 dB.
A QSO is quickly done then. I mean a real QSO, like "Hello Paul, how
are you? You are 10 dB above the decode limit. The WX is fine here,
just a bit cold."
73, Stefan
Am 21.03.2018 14:57, schrieb DK7FC:
Hi Jay, Paul,
I still have the 12 captures from these 12 months. It was 2012. In
attachment is the image from March. Almost exactly 6 years old!
Time is running!
|
