Fwd: Operating CW with GNURadio

Accidentally sent my reply only to Marcus.

---------- Forwarded message ---------
From: Albin Stigö <albin.stigo@gmail.com>
Date: Wed, Dec 24, 2025, 13:19
Subject: Re: Operating CW with GNURadio
To: Marcus Müller <mmueller@gnuradio.org>

You can connect the paddle to a keyer and then connect the keyer output to line in. Then you can use an audio input block + Hilbert transformer to get a baseband cw signal. You will probably have to shift it and maybe upsample too.

Happy holidays,

Albin 

On Wed, Dec 24, 2025, 13:06 Marcus Müller <mmueller@gnuradio.org> wrote:

Hi Mati!

Do you already have a way of connecting your paddle to your computer? That's the hardest
part here, and how you do it will define how you implement the software (i.e., GNU Radio)
side of this.

 > ¿Its there any way to manipulate the SDR from the paddle and tx to send dits and dats?

With GNU Radio, **you** are implementing the SDR, and only the RF samples are sent to the
RF frontend (e.g. via network or USB). I'm worried you're having a radio device that's
something different and doesn't fit into that. What is the "TX-capable SDR" you have, and
how does one interface it with GNU Radio?


Best regards,
Marcus

On 2025-12-23 5:45 PM, lu9cbl@gmail.com wrote:
> Hi to all! i want to operate CW with an TX-capable SDR with GNU Radio, but i want to use
> it with a physical CW doble paddle.
>
> ¿Its there any way to manipulate the SDR from the paddle and tx to send dits and dats?
>
> ¿Any idea if its possible?
>
>
> Thanks to All
>
> Mati LU4BA (Ex LU9CBL)
>
>