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Re: LF: Ebnaut receiver frequency stability qustion

from [DK7FC] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: Ebnaut receiver frequency stability qustion
From: DK7FC <[email protected]>
Date: Wed, 19 Dec 2018 09:22:35 +0100
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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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