OpenRadio Part 2 – Prototype Works!

Since the first post on the OpenRadio project Mark has been moving ahead and leaps and bounds. In just a few late nights work he has assembled and tested the radio, managed to receive off air signals, and even tested the PSK31 transmitter! Fine business Mark.

Mark writes:

Hooked it up to a real antenna tonight:

That’s me decoding actual 20m PSK31 signals!

Signal path is:
Antenna —RF—-> OpenRadio SDR —-IQ–>|Laptop|—-IQ—> Spectravue
(IQ Demod) —SSB—> fldigi

Mark managed to build the radio in 1-2 hours, including taking plenty of photos to document assembly and aid others. Now not everyone will have Mark’s radio assembly skills. However even allowing for a learning curve and a few coffee breaks we are on track for a one-day (say 6 hour) mini-conf assembly time.

A working prototype verifies the hardware design, so we are now getting ready to re-spin the PCB and start putting the kits together.

In other news Edwin from Dragino has added the OpenRadio kit to his store. We estimate the kits will be available for shipping in December. Kim, Mark and I, are still deciding if we will bring a bunch of kits to LCA, or have delegates pre-order them from Dragino. More on that shortly.


OpenRadio Wiki

2 thoughts on “OpenRadio Part 2 – Prototype Works!”

  1. Hi David…

    Is there a mailing list (or just a list) to sign up to receive news of when your SM1000 boards are available?

    I have been following your development with great interest!

    My interest lies in low power HF work (for camping and bicycle touring). I designed and built a 10W 40M CW rig last year enclosed in a small case. Uses Class E PA at about 90% efficiency. Lots of fun working European DX across the pond – but unfortunately still too big for biking. Also, I want to have voice capability. DV would be perfect. I am experimenting with newly received STM32F4 DISCO boards. Coupled with PCM3060 codec for 100 kHz tuneable coverage using a Si504 oscillator (may be too noisy) or fixed frequency oscillators at x4 operating frequency. I am using FFT and then handling tuning and processing in the frequency domain. Pretty cool!!

    I am using the Atollic TrueStudio LITE IDE. It is code size limited which is going to be an issue. I imagine you are using GCC/GDB under LINUX for development? I think I am going to dump TrueStudio and go that way.

    Also, thanks for all your insightful commentaries on life and environmental issues. I too try to use my bike more than my car – but its hard here in CANADA in the winter!!

    Larry, VO1HL

    1. Hi Larry,

      Thank you for your nice post. I’ve been announcing news of the SM1000 on this blog, the Codec 2 and digitalvoice mailing lists. I also enjoy bike riding every day, and have done a little fly/ride bicycle touring. Your STM32F4 radio design sounds very interesting. Do you have a link? Rick and I are interested in extending the SM1000 in 2015 to build a SDR radio, including a 20W PA. Please email me directly if you would like to get involved. I am using gcc/gdb, some notes on that in Codec 2 SVN.



Comments are closed.