Building a CW-only transmitter for 2.4 GHz

    Apologies - it looks like this question doesn't fit into any of the obvious forum categories!

    I was wondering if it would be practical to build a CW-only transmitter for 2.4 GHz?

    I'm hoping it would be reasonably easy to do (obviously not as easy as on HF!).

    Maybe a lower power 2.4 GHz amplifier could be made to oscillate in a clean way using a tuned circuit?

    I expect this is a very naive question...

    Thanks for educating me!

    73

    Mike M0AGP

    Hi Detlev

    Thank you for replying to my question.

    I must admit that I don't fully understand the answer!

    Are you saying that homebrewing a CW transmitter would not be simple because the frequency would not naturally be stable enough? Maybe I would need to add something to make the frequency sufficiently stable?

    Sorry for the very naive questions - I should probably be reading more about what is needed to hit the satellite!

    Thanks

    Mike

    Hi Mike.


    CW QO-100 Transmitter:


    Thread
    QO100 CW QRP TX
    Hello all, we (OM2JU, OK1CDJ) have developed simple CW QRPP (450mW) TX based on 2.4GHz LoRA module.
    • Paddle input -IAMBIC keyer
    • Straight key input
    • Change frequency, power, keyer speed by rotary encoder
    • Frequency callibration
    • Beacon mode
    • cwdaemon compatible UDP server on port 6789
    • WiFi client or AP mode
    • Web interface for WiFi config
    • Web interface for tuning, change speed and power

    More info: https://github.com/ok1cdj/SX1281_QO100_TX

    forum.amsat-dl.org/cms/index.php?attachment/7149/
    OK1CDJ


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    73!

    PY1SAN

    GG77

    Rio de janeiro

    Detlev and Sandro

    Thank you very much for this information!

    An oven controlled crystal oscillator - interesting!


    Sandro - nice video! The automatic translation to English is good enough that I can follow what you are doing.

    The basic parts are low cost, although I guess you need to use an Arduino to control the PLL frequency.


    Very interesting, thank you!


    73

    Mike M0AGP