Stefan

I did see ur switch over to DFCW at 1000 utc and wondered what was happening because it takes so long at that speed to see the change. 

73 de mal/g3kev

 

----- Original Message -----

From: Stefan Schäfer

To: [email protected]

Sent: Sunday, November 27, 2011 11:38 AM

Subject: Re: LF: Re: 8970.005 - overnight

Hi Eddie, VLF,

Thanks for watching! The spectrogram looks fine and i haven't expected that S/N from my low ERP i have here.

Since 10 UTC i switched to DFCW-600 which is well visible at OK2BVG http://www.ok2bvg.cz/vlfgrabber/ but the QRN is higher than in the last days.
Strongs wind comes up here now, so maybe i have to QRT soon. If not i will try to transmit my complete call in DFCW-600.

All in all i think the transmissions on the fixed antenna look promising if i can add another 6 dB but a real kite experiment with the 300m vertical just gives a 20 dB stronger signal and allows better detections in a shorter time. I also like the transmissions on 5170 or 6470 Hz.

73, Stefan/DK7FC

Am 27.11.2011 09:57, schrieb qrss:

Overnight signals at IO92ng http://g3zjo.bplaced.net attached

73
Eddie G3ZJO

On 27/11/2011 00:01, Stefan Schäfer wrote:

Paul, VLF,

Am 27.11.2011 00:16, schrieb Paul:

Stefan,

I register here your signal on the new frequency.

That is fine. Of course i am watching your "grabber" but saw that the signal seems to be weaker since 20 UTC. Is this due to the rising noise? I would think so...

Overnight I expect your S/N here to decline, may even lose
the signal in the noise.  Expecting that as the noise comes
up at Marlton, so will the signal.   We shall see.

Yes. Here, these days the noise has its maximum just before 0 UTC so it may become even better here!

Laurence/KL7UK and Bill/VE2IQ are running their grabbers too. They use GPS locking (with SpecLab, which seems to work well) and loop antennas.
See http://kl7uk.com/VLFAlaska.html and http://www.magma.ca/~ve2iq/grabs/index.htm

Attached provisional uncalibrated spectrum from Marlton 17:00
to 21:00 in one integration.

That looks quite clear. I still can't belive it completely. Does all that mean we have done the first transatlantic detection of a non-commercial generated signal on VLF? If so, please write a good explaning webpage as you did 2010 (it was very nice to read, especially the conclusions ;-) ), so that i can post the link on the LF group!

After first hour on new frequency, the peak on Marlton's
spectrum has moved from 8970.0 to 8970.005.   Will send
phase data in later email.

Which would confirm what is actually done and so it rises the proof that this is my signal! Wow!

Will you change frequency again at say 02:00 in order to
complete a 'K' ?

No, i will now stay on 8970.005 until at least 9 UTC which should allow some further integration times to get a better detection. Maybe some signals will come up in Alaska too. Laurence often reported that DHO38 is strongest just before my local sunrise and has a sudden drop then.
This is my first over-night transmission so i am optimistic to get some more interesting results and propagation phenomena can be observed. BTW, there is room for another 3...6 dB ERP here...

73, Stefan/DK7FC