| Electronics > Projects, Designs, and Technical Stuff |
| Radio Direction Finding |
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| PA3BNX:
Hello Everybody, Two pictures of the 4017 SuperSimpleSoundDopplerwith 4017 chip. It works okay. I will soon release a new version of SoundDoppler121.exe with improved to many zerocrossings routines and of cource the new circuit 4017 in it. |
| PA3BNX:
Hello Everybody, Take a look here: Balint Seeber http://wiki.spench.net/wiki/SDRDF I made a very simple tool to test very easy the 4 antenna array. It's just a battery and 4 switches to switch the antennas on. This makes it easy to test the cable and with a spectrum analyser to check the working of the antenna Assembly. |
| PA3BNX:
Hello Everybody, Here is a nice link to a modern way of RDF ing ! http://www.narda-sts.de/fileadmin/user_upload/cockpit_ida/literatur/IDA-Brochure_E0288A_02_2012.pdf I have build the simple test circuit some messages before. And it's very usefull. I found in one of my Doppler antenna assembly's a diode that was not switching off well I used old diodes from scrap hi . While the diodes are in series so if one doesn't switch off you don't notice it so fast. But I connected my TV tuner spectum analyser to the output cable of the antenna and sweeps just the local 88-108 MHz on the SA And very easy I saw that this unit didn't switch off as good as the others do and I found one diode not being a 1n4148 hi.. After placing it with an other one from scrap it works okay now. |
| PA3BNX:
Hello Every Body, Some body (Michael Schenk) in Germany is using my software for 27 MHz foxhunts I am working on FT817 Cat control module in MyMapping135.exe at the moment. Not ready yet but making progress |
| PA3BNX:
Hello every Body, Today I did some programming to make an extra form in SoundDoppler122.exe For test in the Demo2_mode. A extra button "Adjust" on inputXY screen Now I can adjust with a 3 sliders the amplitude, phase and noise. Generated internal to test all the software routine's to see if they are all correct working. I should have made this earlier hi... I also removed some bugs in the soundcard driver. It's also very nice to see how the software is functioning without having hardware connected. So soon it will be available on the website of Pi4WAG as SoundDoppler122aAll.zip |
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