Date: Wed, 19 Dec 2018 11:46:46 +0000
From: Chris Wilson <dead.fets@gmail.com>
Message-ID: <768761522.20181219114646@gmail.com>
To: Markus Vester <rsgb_lf_group@blacksheep.org>
In-Reply-To: <746980469.6451777.1545179189867@mail.yahoo.com>
References: <746980469.6451777.1545179189867.ref@mail.yahoo.com> <746980469.6451777.1545179189867@mail.yahoo.com>
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Subject: Re: LF: Ebnaut receiver frequency stability qustion
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Hello Markus,

Thanks  to  you  and all who have replied so far. I have a thought. My
TS-590S  has this GPS locked LO fitted, would this allow me to use the
590 for Ebnaut RX ? The kit is now no longer available so hopefully it will
continue to function well...

http://www.vk3hz.net/XRef/XRef_Home.html


Wednesday, December 19, 2018, 12:26:29 AM, you wrote:

> Hi Chris,

> Kiwi-SDR: Last year I asked the same question to John Seamons, and
> he explained that the GPS frequency correction is done in software,
> and won't actually lock the LO phase to GPS.

> RSP2: It seems possible to replace the TXCO by an external 24 MHz
> reference. But the difficulty with the digital output is that you
> need to be sure that buffer over/underruns never occur in the
> subsequent audio processing. With an analog receiver, SpecLab can
> correct glitches when you feed a 1pps time reference to the other
> soundcard channel. Unfortunately you can't do that with an all-digital audio path.

> 73, Markus

> -----Ursprüngliche Mitteilung-----
> Von: Chris Wilson <dead.fets@gmail.com>
> An: rsgb_lf_group@blacksheep.org <rsgb_lf_group@blacksheep.org>;
> rsgb-lf-group@groups.io <rsgb-lf-group@groups.io>; Discussion of the
> Lowfer (US, European, & UK) and MedFer bands <lowfer@mailman.qth.net>
> Verschickt: Di, 18. Dez 2018 23:54
> Betreff: LF: Ebnaut receiver frequency stability qustion


> Hello  Ebnauters


>  Would a KiwiSDR (which I do not own but was thinking of buying) have

>  adequate LF frequency stability for Ebnaut reception given it uses

>  1PPS from a GPS receiver to stabilize the frequency? Or do I need a

>  receiver with a true GPS trained reference input? I see only one

>  cheaper price end RX with such a port, the SDRPlay RSP2, but that

>  expects a 24 MHz reference input rather than the common 10 MHz. I

>  have a Trimble Thunderbolt for a 10 MHz reference, but nothing that

>  could give 24 MHz.


>  What commercial SDR's could I look to for suitable stability please,

>  that are good on LF and below, and a reasonable cost? Thanks 2E0ILY


-- 
Best regards,
 Chris                            mailto:dead.fets@gmail.com