RE: LF: RE: 500 kHz JT4A

[Rik Strobbe <Rik.Strobbe@fys.kuleuven.be>]

Jim,

 

you are good copy here (-18dB).

 

73, Rik  ON7YD - OR7T

 

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Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] namens Gary - G4WGT [g4wgt@tiscali.co.uk]
Verzonden: woensdag 27 januari 2010 22:44
Aan: rsgb_lf_group@blacksheep.org
Onderwerp: Re: LF: RE: 500 kHz JT4A

Jim,

Thanks, getting a weak very trace & the decoder is indicating a signal sync but hardly visible, please keep trying, QSB may bring you up.

Gary - G4WGT.

2010/1/27 James Cowburn <james.cowburn@virgin.net>

Hi Gary

 

Just got two decodes of you at -12dB and -15dB 2116 and 2118.

 

I have replied with my call and locator on odd minute txing

With best regards

 

Jim

 Dr. James Cowburn

E james.cowburn@virgin.net

 

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From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Gary - G4WGT
Sent: 27 January 2010 21:03
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: RE: 500 kHz JT4A

 

Rik, & Andy,

 

Thanks for your report & comments & Andy for answering Rik's query.

 

Well there has not been any response to my CQ call so I will change the text to beacon & continue to see if there is a report from further afield.

 

If you want to try for a weak decode I can reduce the power for a short period say 30 minutes, my power is 50 watt RF (200 mW ERP) at the moment so in view of your good report I could take it down to 10 watts RF.

 

Let me know.

 

73, Gary - G4WGT - IO83qo

2010/1/27 Andy Talbot <andy.g4jnt@googlemail.com>

-24dB S/N (2.5kHz )  is usually guaranteed

Andy
www.g4jnt.com

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2010/1/27 Rik Strobbe <Rik.Strobbe@fys.kuleuven.be>

 

Gary,

 

solid copy here, SNR -5 to -7dB.

But the signal is clearly audible, CW would be armchair copy.

Any idea down to what SNR values JT4A produces a usable decoding ?

 

73, Rik  ON7YD - OR7T

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Van: owner-rsgb_lf_group@blacksheep.org [owner-rsgb_lf_group@blacksheep.org] namens Gary - G4WGT [g4wgt@tiscali.co.uk]
Verzonden: woensdag 27 januari 2010 20:33
Aan: Rsgb_Lf_Group
Onderwerp: LF: 500 kHz JT4A

LF,

 

Running JT4A this evening on 503.600 kHz, dial frequency 502.300 kHz USB.

 

73, Gary - G4WGT - IO83qo