SM1000 Part 7 – Over the air in Germany

Michael Wild DL2FW in Germany recently attended a Hamfest where he demonstrated his SM1000. Michael sent me the following email (hint: I used Google translate on the web sites):

Here is the link to the review of our local hamfest.

At the bottom is a video of a short QSO on 40m using the SM-1000 over about 400km. The other station was Hermann (DF2DR). Hermann documented this QSO very well on his homepage also showing a snapshot of the waterfall during this QSO. Big selective fading as you can see, but we were doing well!

He also explains that, when switching to SSB at the same average power level, the voice was almost not understandable!

SM1000 Beta and FreeDV Update

Rick KA8BMA has been working hard on the Beta CAD work, and fighting a few Eagle DRC battles. Thanks to all his hard work we now have an up to date schematic and BOM for the Betas. He is now working on the Beta PCB layout, and we are refining the BOM with Edwin from Dragino in China. Ike, W3IKIE, has kindly been working with Rick to come up with a suitable enclosure. Thanks guys!

My current estimate is that the Beta SM1000s will be assembled in November. Once I’ve tested a few I’ll put them up on my store and start taking orders.

In the mean time I’ve thrown myself into modem simulations – playing with a 450 bit/s version of Codec 2, LPDC FEC codes, diversity schemes and coherent QPSK demodulation. I’m pushing towards a new FreeDV mode that works on fading channels at negative SNRs. More on that in later posts. The SM1000 and a new FreeDV mode are part of my goals for 2014. The SM1000 will make FreeDV easy to use, the new mode(s) will make it competitive with SSB on HF radio.

Everything is open source, both hardware and software. No vendor lock in, no software licenses and you are free to experiment and innovate.

3 thoughts on “SM1000 Part 7 – Over the air in Germany”

  1. Very promising indeed..

    Great work guys, can’t wait to get our hands on one. :)

    all the best..
    Walter/K5WH

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