Re: LF: Re: Band is open to VK!

[John Langridge <jlangridge@sbcglobal.net>]

>WSPR is maybe 30 dB more "efficient", if just a positive detection counts. So CW will be hard!

I definitely agree that CW will be hard over the very long haul but I am encouraged with improvements in receiver technology/DSP and smaller, high performance receive antennas. 

Out of curiosity, are most stations in Europe  using directional RX antennas or only omnidirectional/TX antenna?  Most of us here state side that have made it across at one time or another using WSPR or other modes are using directional antennas.  Just a matter of curiosity on my part.

also is there a repository of records from the last solar minimum on 630m?

73!

John KB5NJD / WG2XIQ..

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From: DK7FC <selberdenken@posteo.de>
To: rsgb_lf_group@blacksheep.org
Sent: Friday, August 21, 2015 9:09 AM
Subject: Re: LF: Re: Band is open to VK!

Hi Fausto,

Am 21.08.2015 15:39, schrieb Fausto Coletti:

Hi Stefan,

 

It would be interesting try to transmit a robust CW signal on 472 KHz,

eventually with a lambda/4 kite antenna on the saltwater.

Yes, on a north sea island :-) With my 300m kite antenna of 2010/11. And with 2 kW or more, on a hard keyed PA with some chirp and hum ;-) Chris would agree i bet :-)

It is a bit of time I'm thinking... ;-)

Some years ago I made several QSOs on 160m with VK and ZL from my home

with the same 25m tophat antenna that I use for 630m.

Why not try also on MF ?

630m is a BIG difference to 160m when it comes to DX. I saw WSPR decodes on 160m between EU and VK with 2W (TX power). All the time there are active WSPR stns TXing on 630m during the interesting time period and there are plenty of active RX stations. But decodes are very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very very rare! :-)
WSPR is maybe 30 dB more "efficient", if just a positive detection counts. So CW will be hard!

Maybe you saw the capture from the dropbox link. There are just a few traces and most CW men would interprete this as strange nonsense. But it is an undoubtful trace on my transmission, where frequency and timing and the content matches. That is in DFCW-180, which means a "D" takes 11 minutes to transmit. In CW, my TX power would have to be in the range of 100 MW! So no chance for CW at all...

73, cul, Stefan

 

 

73, Fausto IK4NNMF

 

 

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

From: DK7FC

To: rsgb_lf_group@blacksheep.org

Sent: Friday, August 21, 2015 2:26 PM

Subject: LF: Band is open to VK!

Hi LF,

It's time again to try attemps to leave traces in VK. Edgar is running his grabber at https://dl.dropboxusercontent.com/u/101251787/testIDC.html
Starting 18:30 UTC, i will attempt to leave a trace in DFCW-180 there. The best result so far was that: https://dl.dropboxusercontent.com/u/19882028/LF/Dk7FC%20ver%20o%20spec.png
Will someone join in?

73, Stefan

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