[Lowfer] New JT9 Experiment

[N8OOU]

Paul,

I started wsjt-x and have captured several JT9-1 transmissions. I see 
the JT9-2 transmissions in the wsjt-x waterfall.

I have hit google fairly hard to find a download source for your SlowJT9 
software, but have not been successful. Do you have a link to the 
webpage? I haven't found any reference to it.

If I can't get software to run on Linux, I could record an audio file 
for the JT9-2 software to decode if you can import it to your software.

0402 -22  2.9 1220 @  VVV N1BUG 1
0408 -16  2.9 1220 @  VVV N1BUG 1
0414 -22  2.9 1220 @  VVV N1BUG 1
0420 -22  2.9 1220 @  VVV N1BUG 1
0426 -22  3.0 1220 @  VVV N1BUG 1
0432 -17  3.0 1220 @  VVV N1BUG 1
0438 -14  2.8 1220 @  VVV N1BUG 1


73   de   N8OOU - Mike Meek

On 12/10/18 8:02 AM, N1BUG wrote:
> The aim of the SlowJT9 project is to bring back the 2, 5, and 10
> minute JT9 modes with the hope of facilitating more weak signal QSOs
> on MF and LF.
> 
> We need to see if the slower modes are providing copy where the
> regular 1 minute JT9 mode does not.
> 
> I am now transmitting alternating JT9-1 and JT9-2 on LF at a
> frequency of 137.350 (1350 Hz audio with a USB dial frequency of
> 136.000).
> 
> If some receiving stations will monitor both modes and send
> reception reports, we may begin to collect useful data.
> 
> It is easy to receive both modes at the same time. Use any recent
> version of WSJT-X to receive JT9-1. Use SlowJT9 version 0.9.11 or
> later to receive JT9-2.
> 
> Each morning, participating stations please send your complete list
> of decodes for both modes to me.
> 
> The future of this experiment will depend on participation. I hope
> it will generate enough interest to collect meaningful data on the
> relative performance of JT9-1 and JT9-2 on LF. Later, when JT9-5 and
> JT9-10 are working I propose to extend this experiment to test those
> modes.
> 
> I invite other transmitting stations to join me in these experiments.
> 
> 
> 
> *** Note ***
> 
> One limitation of this experiment is that it will only be possible
> to compare as follows:
> JT9-1 to JT9-2
> JT9-1 to JT9-5
> JT9-1 to JT9-10
> 
> I believe there is no easy way to receive any combination of JT9-2,
> JT9-5, and JT9-10 simultaneously (without going back to a format
> which I cannot beacon on multiple modes). Therefore it will not be
> possible to make direction comparisons between the slower modes as
> far as I know.
> 
> I had thought about using WSPR as a standard reference for
> comparison to all JT9 submodes but this does not appear to be
> practical with present limitations on audio frequency for the 5 and
> 10 minute JT9 modes. It would require a wide spread in transmitting
> frequencies or multiple receivers at the monitoring stations. My
> antenna tuning is too sharp to allow transmitting on widely
> separated frequencies.
> 
> Comments and suggestions on improving this test are welcome!
> 
> Thank you and 73,
> Paul N1BUG
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