Re: Generating CW-morse signals with a straight key

[Albin Stigö]

I did extensive experimentation with this and it's tricky to get the timing good enough with GPIO.

Like Gorkem says mic/line is a good option. You can connect an oscillator and just send a tone in, filter this and then just send it as "SSB" as a pure tone in SSB is just a carrier. You can also key a DC bias after the AC coupling and generate the tone on software.

Good luck 73s Albin SM6WJM

On Sat, Dec 28, 2019, 20:06 Gorkem Ozcelebi <address@hidden> wrote:

If I've understood your question correctly, how about the microphone / audio input? If it's ac-coupled, you could use a simple oscillator. The presence of the tone, gated by your morse key, triggers the cw. If you don't want to build / provide an external oscillator,  how about a software oscillator fed through one of the audio output channels of the same PC, going back in thru your morse key. The other audio channel is left available for the audio output of your receiver.

Gorkem

On Sat, Dec 28, 2019, 7:25 PM Harald Fritzsche (DD0VS) <address@hidden> wrote:

Hello All,

Hoping that amateur radio is not to far away from common use of
Gnuradio mailing list, but amateur radio is making me looking to GR
since 2001.
There is a plan to use a Gnuradio based transceiver for µ-wave
contesting, as it has been shown by W7FU or KB1VC (SoDaRadio) or DL9SW.
A needed condition is, to key HF with morse code using a straigth or
simple morse key.

Doing this with just looking to the status of /dev/ttyUSB0-CTS pin is
not sufficient, basically some of the keyed code is somehow swalloed.
Neither with python code or with a C++ OOT module i got it solved.

How to get this solved? (Hardware keying or modulated cw is not a real
option).

Regards and vy73
Harald
DD0VS