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Issue #26: Guest Article - The RFBitBanger Transceiver and SCAMP Digital Mode

Discussion in 'Trials and Errors - Ham Life with an Amateur' started by W7DGJ, Aug 24, 2023.

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  1. N3HFS

    N3HFS XML Subscriber QRZ Page

  2. KL7KN

    KL7KN Ham Member QRZ Page

    Thank you for your time to post this.
     
    W7DGJ likes this.
  3. W7DGJ

    W7DGJ Platinum Subscriber Platinum Subscriber QRZ Page

    Hi Alex, great post -- sure adds some value to the article. Much appreciated, Dave W7DGJ for "Trials and Errors -- Ham Life with an Amateur"
     
  4. KW4TI

    KW4TI Ham Member QRZ Page

    Thanks very much for your feedback and the praise. It really does mean a lot. I put a lot of hard work into this and I hope that it meets expectations. I know it's not perfect but I wanted something that would simultaneously be very usable and buildable from simple parts, not an easy combination to achieve.

    You can use the RFBitBanger to send CW, just by typing in your message into the keyboard. It also supports a paddle if that is your preference (set the mode and WPM first in the configuration).

    BTW, there is an indicator bar for signal strength. For example, there are instructions in the manual on how to use WWV and CW mode to calibrate the crystal frequency. To do this, the signal strength bar is maximized on the tone. I usually use the 10 MHz frequency for this, and I find that I can get it within +/- 20 Hz this way fairly readily. The signal strength indicator is important if you use SCAMP because it's what you use to line up the internal filters with the two SCAMP FSK tones.

    Also, I did make a version of fldigi that includes SCAMP, so that all of you who don't have an RFBitBanger can try SCAMP. You can clone the repository at https://github.com/profdc9/fldigi . I hope to get this into the official fldigi distribution. I have tested it back-and-forth with the RFBitBanger and it works well. It's probably even a good more for ordinary use, as it is low bandwidth and uses FEC. It includes all six modes (both OOK and FSK) that are implemented in the RFBitBanger.

    Again thanks for your feedback and I hope you enjoy your RFBitBanger and make many QSOs with it!

    73,
    Dan
    KW4TI

     
  5. W7DGJ

    W7DGJ Platinum Subscriber Platinum Subscriber QRZ Page

    Thanks Don for the courtesy you show when you are here. A valued part of our community! Dave
     

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