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RE: LF: EbNaut Attempt?

To: "[email protected]" <[email protected]>
Subject: RE: LF: EbNaut Attempt?
From: VIGILANT Luis Fernández <[email protected]>
Date: Thu, 4 Oct 2018 14:00:30 +0000
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Thread-topic: LF: EbNaut Attempt?

Thank you Riccardo


And thank you Antonio too, for the complete information in the web page

I will make a pcb with the 4013 and 4070 to be piggi backed into the 4013 shocket


73 de Luis



De: [email protected] [mailto:[email protected]] En nombre de Riccardo Zoli
Enviado el: jueves, 04 de octubre de 2018 10:37
Para: LF Group <[email protected]>
Asunto: Re: LF: EbNaut Attempt?



Hi Luis, Markus, LF


Yes, Luis. Like Markus said, you're using a wrong position to change the phase.

With Tony IK1HGI, we have tested a solution to produce a correct BPSK modulation using a G0MRF PA schematic. Here's the link to Tony's website page, that explained clearly what to do:




In short, the XOR operation must be carried out after the x2 stage (D-ff, CD4013) simultaneously on Q and Q denied signals.


All the best




73 de Riccardo IW4DXW






Il 04 Ott 2018 07:37, "VIGILANT Luis Fernández" <[email protected]> ha scritto:

Hi Markus, EbNaut


It was me, with 80w from the D class PA


I'm producing 180° phase shifts with xor at 2x the frequency to feed the PA. So it seems that the PA do also reduce phase shifts to half :(


Which would be the way to do it ?


Congratulations for the EbNaut grabbers


73 de Luis



El 3 oct. 2018 11:29 p. m., Markus Vester <[email protected]> escribió:

Between 19:58 and 20:28 there was a strong and stable signal on 137490.0 Hz, coming in from west or southwest. However the keying seemed to be in 90° steps instead of 180°, so not decodable. Maybe a problem with a /2 divider in the transmit chain?

Best 73,
Markus (DF6NM)


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