USB audio interface

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Last Updated: Monday, 12 April 2021 08:19

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Our corsican repeater network TKNET uses the Asterisk software for the routing and communication between nodes. In order to digitalize the audio signals and interface them with the repeaters, i developped a small interface board some years ago. It was using a cheap USB audio stick that we modified and plugged on my board.

With time, this solution appeared to be not the best choice for different reasons. So, the idea to build a newer board with an onboard USB audio chip was born.
Being retired, i found the time and mood to develop a new interface board using the same chip CM119A which is a small LQFP-48 case.

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My "WW locator" and "Rains scatter" maps updated !

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Last Updated: Wednesday, 09 June 2021 19:05

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Since some time, Google requests a billing account for the use of their Google maps, what i refuse to do...
My scripts "WW locator map" and "Rain scatter" since offered a limited map with very few details.
I therefore modified my scripts to use the Openstreetmap maps which are beautiful and detailed.
Don't be bothered by the Google warning window at  startup, just ignore it and click OK.

21/06/06 update. Some modifications were done :
- Satellite image source change.
- Faster image loading
- No more animated image.
Enjoy the new maps, and feedbacks (very rare) are welcome !

End fed half wave antenna 40/30/20m

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Last Updated: Thursday, 03 June 2021 10:31

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For my SOTA activities, i recently bought a QRP transceiver QRP SW-3B, which is a three-band QRP CW only for 40/30/20 m.
So, i needed an antenna that would allow to use these 3 bands in SOTA portable activity.
Already having some experience with the EFHW antenna, i decided to build one for 40/30/20m.
The main advantages of this EFHW antenna are :
- easy to build
- multiband
- needs only one support, can be installed in line, inverted V,  zigzag.
- fed at its extremity, can be directed connected to the transceriver, without any coaxial cable.
- the radiating part is at the center
All these advantages are welcome for portable operations and make this antenna a perfect candidate for SOTA

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