Alaska is still too far away for me. Even in EbNaut :(
I'm struggling here with the antenna. Most of the time impedance rises and I hardly run 1A RF current
For long EbNaut transmissions the PA needs to work more relaxed and last night it was no more than 200mA
Domenico decoded my messages too. I tried a 30 characters message at 0.1s but didn´t work
Which are the EbNaut scripts you have configured now, Domenico ? Only for 6 characters at 3s/symbol ?
Can you run different srips at the same time to try different message lenghts and speeds ?
Rainy weekend here. Impedance drops a lot after rain. Let's see how much current can drain
Last time I could see almost 4A RF. But for short time untill a mosfet rised a white flag ;-)
73 de Luis
Im trying to quieten down my 1pps into the sound card so it doesnt bleed over....getting there slowly!
Another strong decode with zero symbol errors. This can go much further! I hope someone in DX-land is observing the frequency.
Von: VIGILANT Luis Fernández <[email protected]
An: [email protected]
Verschickt: Do, 25. Okt 2018 12:36
Betreff: RE: LF: EbNaut Autodecoder 137490 Hz: EA5DOM received
Hi Domenico, LF
I can test again tonight. No problem. I will transmit in “second” periods at minute 30
Finally made an small pcb with 4013 and 4070 in SMD. It plugs directly in the 4013 shocket. Uses just one row of the shocket
So it is a very easy way to get phase modulation in Class-D G0MRF style PA’s. Just plug and play. Attached is a picture of an ugly
wired version. A new pcb is already designed using just one side, no drills, and just one wire jumper. Easy to reproduce with
big SMD components (1206)
Schematic and picture attached
73 de Luis
De: [email protected] [mailto:[email protected]]
En nombre de Domenico IZ7SLZ
Enviado el: miércoles, 24 de octubre de 2018 23:36
Para: [email protected]
Asunto: Re: LF: EbNaut Autodecoder 137490 Hz: EA5DOM received
i'm sorry Luis becouse i miss your recent EbNaut transmissions.
My Linux PC was engaged in SAQ reception. After dinner i have restored the setup and now receiver on 136.490 kHz and autodecoder are again operational so i hope that you are planning to transmit again further messages tonight.
Good reception of SAQ here in JN80nu thanks to very low QRN and to Paul's vlfrx-tools used for acquiring, filtering and stream the audio to Windows PC. Then i have used Spectrum Lab to convert to analog and send the audio
to the speaker. Path is about 2300 km.
This is the audio recordered:
In perfect 'vintage' marine radio officer style, i have prepared the text sent by SAQ :
a nice text about the Peace. Thanks to the SAQ staff for their activities.
Thank you Markus ! :-)
A second message was transmited at odd (second) period. Your auto decoder is performing very good
Luis, you've made it!
An error-free decode at DF6NM, and also successful at DL0AO (with lower SNR, presumably due to the RX antenna pointing in another direction).