Message-ID: <5C19FFCB.1060305@posteo.de>
Date: Wed, 19 Dec 2018 09:22:35 +0100
From: DK7FC <selberdenken@posteo.de>
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To: rsgb_lf_group@blacksheep.org
References: <10f465fa-37f0-4ac6-b53d-793f955ea011@email.android.com>
In-Reply-To: <10f465fa-37f0-4ac6-b53d-793f955ea011@email.android.com>
Subject: Re: LF: Ebnaut receiver frequency stability qustion
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Hi Luis, LF,

I agree, this is indeed the most reasonable design. Using the same here 
;-) but a 125 kHz LO, locked to GPS.
Maybe we should provide easy converter crcuits. A compromise between 
high end and easy to build up, for the 'EbNaut-newcomers'?

73, Stefan

Am 19.12.2018 07:39, schrieb VIGILANT Luis Fernández:
> Hi EbNaut
>
> I think that using expensive receivers is NOT the way to go. I'm using 
> a simple mixer as downconverter. The LO is 120KHz generated from a 
> uBlox GPS. So the 137KHz outputs as 17KHz and can be feeded to PC 
> soundcard. The second channel of GPS provides 1pps to discipline the 
> soundcard using Spectrum lab
>
> Not using filters at all and no amplifier stages. So there is room for 
> improvement, but it works
>
> 73 de Luis
> EA5DOM

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Hi Luis, LF,<br>
<br>
I agree, this is indeed the most reasonable design. Using the same here
;-) but a 125 kHz LO, locked to GPS.<br>
Maybe we should provide easy converter crcuits. A compromise between
high end and easy to build up, for the 'EbNaut-newcomers'?<br>
<br>
73, Stefan<br>
<br>
Am 19.12.2018 07:39, schrieb VIGILANT Luis Fernández:
<blockquote
 cite="mid:10f465fa-37f0-4ac6-b53d-793f955ea011@email.android.com"
 type="cite">
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <div dir="auto">
  <div>Hi EbNaut</div>
  <div dir="auto"><br>
  </div>
  <div dir="auto">I think that using expensive receivers is NOT the way
to go. I'm using a simple mixer as downconverter. The LO is 120KHz
generated from a uBlox GPS. So the 137KHz outputs as 17KHz and can be
feeded to PC soundcard. The second channel of GPS provides 1pps to
discipline the soundcard using Spectrum lab</div>
  <div dir="auto"><br>
  </div>
  <div dir="auto">Not using filters at all and no amplifier stages. So
there is room for improvement, but it works</div>
  <div dir="auto"><br>
  </div>
  <div dir="auto">73 de Luis</div>
  <div dir="auto">EA5DOM</div>
  </div>
</blockquote>
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