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Radio Direction Finding
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PA3BNX:
Hello Every Body,


Some pictures of mij 60 bij 60 cm plate 5 antenna doppler array

I used radio telescoop arials.

I can use this one easy for 2 m and 70 cm...
(Just adjust the length telescoop whipes acordingly hi)

Diameter arials about 28cm Antenna plate 60 bij 60 cm

I did use cardboard with alu foil.
I did use an earth wire from solder lug to solder lug near the arial feet points
to make shure the is good mass for accurate doppler readings.

Because you need goud ground at antenna feed points.

Swither and 4017 5 transistor soft switcher both in 5 bij 5 cm boxes
dead bug methode.

The red box is also used for testing the antenna's with the db 9 control cable.





See pictures.
HUTCOMINT:
I might of got confused about something.
Is the stereo sound card input on the PC still required for the ArduinoDoppler?

Edit: found the part that got me confused in the arduino sketch...

" Why because there are so many laptops with just mono mic inputs
  This can eliminate the external USB stereo input Soundcard with MyMapping.exe software"

I somehow took this to mean there wasn't ANY soundcard connection. Now reexamining it I believe it means just the left channel input is used?

PA3BNX:
Hello Every Body,

No the soundcard doppler can stil be used with the 4017 de luxe circuit

The arduino can run through USB wiothout sound card on MyMapping.exe
The arduino can ofcourse also deliver audio on doppler ref freqency if you wish
End then audio through the stereo soundcard...
So the arduino can also mimic the 4017 circuit fully


Yes many laptops have just mono Sound Mic inputs
so you will need then UCA202 Behringer USB soundcard or other USB stereo soundcard??

If you use the arduino with mymapping through USB port only
then you still must feed the arduino with the speaker  rx audio ofcource
No sound card needed on the laptop then



I have a new version1.60  comming with a so called FT817 Cat S-meter history screen.
Very handy I think.

See picture Green form.

PA3BNX:
Hello Every Body,

I have done now a so called Budget doppler on request from PA5ROB
in SoundDoppler152.exe Now on PI4WAG (version 160d.zip)

Two antenna gives of cource ambigity and only 270>0>90 degrees range

So have fun with this new option.

73's

PA3BNX
PA3BNX:
Hello every body,

I have a new version SoundDoppler160e now on PI4WAG with SoundDoppler1.53

That has an improved Budget Detector 2x antenna mode so the one with
just 2 monopoles and ambiguity.

Hope this one works better!!

It also detects multipath rx now !!!

So have fun guys.
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