LF: Re: JT9-10 on 137.42 kHz

[André Guyé <andre.guye1@aliceadsl.fr>]

OK Stefan, but with your large antenna, 5 W means perhaps 50 mW ERP. 12 years ago with about 100 mW ERP I had a good CW QSO with EI0CF over 1000 km on 136.5 kHz. So between us, I think this report is normal...

 

Now I am still listening for you.

 

73, Andy

 

From: Stefan Schäfer

Sent: Thursday, November 22, 2012 4:16 PM

To: rsgb_lf_group@blacksheep.org

Subject: Re: LF: JT9-10 on 137.42 kHz

 

André,

Incredible! 559 with 5W????? There must be a special propagation path between us :-)

Thanks for the reports. The 20 mHz offset may be from my side because the frequency is not generated in SpecLab...

Is that a +14 dB SNR??? Can't belive it!!!!! So i could go down to 250 uW TX power (not ERP!) and you will still decode me :-)

73, Stefan


Am 22.11.2012 16:03, schrieb André Guyé:

Always good signal Stefan JT9-10  on 137.42. Also 559 clear by ears. Sorry, I have 0.02 hertz error on your frequency.

 

1430 10 14 0.0 1419.98 0.00 DK7FC JN49IK

1440 1 -3 -1.7 1424.14 0.00

1450 10 13 0.0 1419.98 0.00 DK7FC JN49IK

 

73 de F6CNI Andy – JN19QB

 

From: Stefan Schäfer

Sent: Thursday, November 22, 2012 3:15 PM

To: rsgb_lf_group@blacksheep.org ; Vasily Savchenko

Subject: LF: JT9-10 on 137.42 kHz

 

LF!!!

I'm running some JT9-10 on 137.42 kHz. So far we concentrated to JT9-1...JT9-2, as suggested by Joe. However the program may be very suitable for serious data mode DX on LF/MF after fixing some bugs.

I'm running only 5W TX power, later, when the band opens for DX i may rise the levels by some dB. I do not expect timing of frequency drift problems from my side.

Reports apprechiated :-)

If there is some interest on the TA side, i may run this over the night as well.

73, Stefan/DK7FC