Here's the video of the ZL3IN c2qso.sh contact. Remember, this is just raw UDP packets over the internet, with no error correction, and you're hearing the Codec2 audio just as it was transmitted in the conversation.
Yes, Zilvis, the audio was duplex. With my shell script, if both sides keep 'transmit' on, it will operate duplex.
While codec2 might be useful for general Internet comms in certain circumstances, in general I think the higher bandwidth codecs are a better idea for Echolink, etc. For hams, codec2 will shine in digital voice systems similar to D-star.
I've built the QFH antenna recently published in QST. The result is very omni-directional, as advertized; but I found the construction rather difficult. Here are some notes on the process.
Lots of progress with 'satpack', my Arduino-based full-doppler-tuning satellite tracking application. On the right, you see a cardboard mockup of the pcb. On the software side, I've checked a fully working version of the code into the SVN repository.
The AA2TX parasitic lindenblad, which was published in Feb 2010 QST (and has been available online for some time), is proving to be an enjoyable project. I have modified some components because I could not find them here in Atlantic Canada. The #8 aluminum wire for the passive elements is not in our big box stores (different wiring regulations?), and the PVC ferrules require a special order, at least at this point in the year, when no sane person would be installing eavestroughing. So I made do with what I had, and the results are encouraging.
Great video! And audio too! Was that full duplex comms?
ReplyDeleteAlmost half step to the next Echolink incarnation (multiplatform, oss) hi
Best 73! Zilvis
Yes, Zilvis, the audio was duplex. With my shell script, if both sides keep 'transmit' on, it will operate duplex.
ReplyDeleteWhile codec2 might be useful for general Internet comms in certain circumstances, in general I think the higher bandwidth codecs are a better idea for Echolink, etc. For hams, codec2 will shine in digital voice systems similar to D-star.