Electronics > Projects, Designs, and Technical Stuff
Radio Direction Finding
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HLA-27b:
Beautiful work, and good job on the web site too.

Now that the hard work is done I hope folks start building some of their own. Maybe even I could try my hand on it!
PA3BNX:
Hello all out there,


I found a nice looking chip for the doppler switcher units


Take a look at :


http://search.digikey.com/us/en/products/AS204-80LF/863-1008-1-ND/2052163


PA3BNX:
Hello Every Body,


I found a nice antenna for experimenting from SM0VPO for the
Super Simple Sound Doppler Doppler.

It looks okay and very small but i di not now the bandwidth
but I think it is usable for a VHF DSP SoundDoppler.
sacherjj:
I was looking at one of these a while back.  I believe there was a QRP article on it.  It linked to a Ramsey kit.  http://www.ramseyelectronics.com/downloads/manuals/DDF1.pdf   I believe this was by WA2EBY. 

Using the sound card to do the dopper is a cool twist.
PA3BNX:
Hello Every Body,

Okay I know it's easy to adapt a conventional
doppler like the Ramsy  DDF1 to make it
works also together with my Sound Doppler Software.

You just connect a low pass filter  on one of the
antenna switcher outputs and make a sinus from it
at the rotation frequency from the doppler.

If you do this then it's nice too have an independent
16 led pelorus readout  and the readout on the PC..
with maps etc.


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