To: rsgb_lf_group@blacksheep.org
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 <9d58deff-f2c8-d84c-6342-6d5e7c10bda5@n1bug.com>
 <1517741903408.732@kuleuven.be>
From: N1BUG <paul@n1bug.com>
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Date: Sun, 4 Feb 2018 06:30:35 -0500
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Subject: Re: LF: MF/630M
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Hello Rik,

Somehow I had not seen that before! It is excellent and answers 
almost all my questions.

I'm still curious about one thing. QSB can be a big problem (as with 
EME, hi). This can make it difficult to know exactly when a station 
has stopped his transmission. Is the timing always "random" or are 
timed TX/RX periods sometimes used? It seems like it would be easier 
with timed sequences. The only difficulty I see is correctly 
calculating how much time will be needed to send the longest 
expected message in a QSO. It takes me half a sheet of paper and a 
lot of scribbling to figure that out. ;-)

I'm very interested in this subject since it is my dream to complete 
a trans-Atlantic QSO on 2200m when I get enough TX power.

73,
Paul N1BUG


On 02/04/2018 05:58 AM, Rik Strobbe wrote:
> Hello Paul,
> 
> "I am looking for information on QSO operating procedures for QRSS. I have only seen it used for beaconing."
> 
> See http://www.472khz.org/pages/technical-topics/weak-signal-modes/extreme-narrow-bandwidth-modes.php (scroll down to "operating practice").
> 
> Maybe we should organize a transatlantic QSO party? JT9 and QRSS maybe the best modes for most of us, the "big guns" can try FT8 or plain CW.
> 
> 73, Rik  ON7YD - OR7T
> 
> ________________________________________
> Van: owner-rsgb_lf_group@blacksheep.org <owner-rsgb_lf_group@blacksheep.org> namens N1BUG <paul@n1bug.com>
> Verzonden: zondag 4 februari 2018 11:47
> Aan: rsgb_lf_group@blacksheep.org
> Onderwerp: Re: LF: MF/630M
> 
> Just think how many trans-Atlantic QSOs could be made. Some, like
> myself are very interested but the primary problem is no one awake
> on the east side of the pond at the right times!
> 
> I have seen signals strong enough for normal CW only a few times.
> JT9 would be easy and requires only about 3 dB more signal to decode
> than WSPR2. I am looking for information on QSO operating procedures
> for QRSS. I have only seen it used for beaconing.
> 
> I've been off MF for a while as I put up a temporary HF antenna to
> work the Bouvet DXpedition and it severely messed up tuning of the
> MF antenna. Now that the Bouvet trip has been aborted I will be
> taking that antenna down and returning to MF as soon as I get a
> reasonable weather window. I will likely be on MF for a week or so
> before moving to LF.
> 
> 73,
> Paul N1BUG