Introducing SmartMic Ham Radio Digital Voice

Discussion in 'Amateur Radio News' started by G4TUT, May 22, 2014.

Thread Status:
Not open for further replies.
ad: L-HROutlet
ad: l-rl
ad: MessiPaoloni-1
ad: L-MFJ
ad: Left-2
ad: Subscribe
ad: DLSpec-1
ad: Left-3
  1. G4TUT

    G4TUT Ham Member QRZ Page

    Introducing SmartMic Ham Radio Digital Voice

    David Rowe VK5DGR and Rick Barnich KA8BMA have been working on SmartMic, an embedded hardware product that allows you to run FreeDV without a PC. Just plug it into your SSB or FM radio, and you now have Digital Voice (DV)

    The whole design is open hardware (TAPR license). It will run an embedded version of FreeDV which is also 100% open source.

    Based on a STM32F4 micro-controller, SmartMic has a built in microphone, speaker amplifier, and transformer isolated interfaces to your radio. It’s just 80 x 100mm, and can be held in you hand and used like a regular PTT microphone, or sit near your radio in a small box form factor. SmartMic will be in production later in 2014 and will retail for US$195.

    Read about SmartMic at

    Codec 2

    FreeDV: Digital Voice for HF

    Join the FreeDV Codec2 email list at


    Follow Southgate News on Twitter
    Become a Facebook fan
  2. W5LMM

    W5LMM Platinum Subscriber Platinum Subscriber QRZ Page

    That's GREAT!
  3. K7MHI

    K7MHI Ham Member QRZ Page

    That is great, but looks like the news is in its infancy still. Excited for the platform to be released and mature a little. I am concerned about adopting it day one as I have a feeling it will mature quickly in a 2.0
  4. KC2UGV

    KC2UGV Ham Member QRZ Page

    You can go the software route too, so no hardware investment there. Then, you can wait until "maturity" to dive into hardware.
  5. NQ0S

    NQ0S Ham Member QRZ Page

    This great news. We have to get some type of standard in place for radio interoperability in digital. It is really frustrating that the major manufacturers are staying with incompatible solutions. Maybe there is light at the end of the digital tunnel.
  6. K5OKC

    K5OKC Ham Member QRZ Page

    While you could "plug it in" to an FM radio, this is highly deprecated using the current Frequency Division Multiplex (FDM) waveform. This waveform allows 1600 bits/sec in about 1.3 kHz of bandwidth. Very spectrum efficient. A real advantage on SSB.

    Plugging this into FM will take the 1.3 kHz and blow it out to your FM channel width, and doesn't offer any advantages over analog FM.

    Like any continuous duty waveform, you will need to use a much lower power than you're used to on analog. The narrow bandwidth, and error correction provide a good trade-off.

    73, Steve
    Last edited: May 26, 2014
Thread Status:
Not open for further replies.

Share This Page