Ciao, devo finire alcuni test e poi sarà acquistabile . Puoi mandarmi una mail a jackdev23 at gmail.com Il costo Full mounted and tested (no box) = 120 euro Servono 4 antenne attacco SMA e un ricevitore o rtx non forniti :)
Ciao Marco, il software per pc è gratuito e scaricabile qui http://www.pi4wag.nl/index.php/pseudo-doppler-radio-direction-finder Il software per arduino è propietario, fornisco a richiesta arduino nano già programmato a 20 euro
Hello I am PA3BNX the writer of the SoundDoppler software.
Can the antenna switcher disconnected from the main board or must I use 4 coax cables. One to each antenne of same length ? And does it disconnect the antenna and cable so it does not reflect or absorbs antenna energy and disturbs RF field from the near doppler array field ?
Hello PA3BNX, glad to hear from you :) As you can see in the pcb pictures, you can break the pcb in 2 parts: logic and switches. If you like to use switches part remotely, you need 4 wire (not coax) to control the switches + 1 coax cable to connect te RX . Clearly, you have to connect 4 antennas with same coax cable length to switches board. Switches disconnect antenna in off state = does NOT go to 50 ohms load. Hope this help, let me know. Ciao Luca
Hello Lodewijk I think you can find all the answer by checking the datasheets of AS169 http://www.skyworksinc.com/uploads/documents/200105E.pdf If you like, send me an email and I will send you a pcb or whatever you need to test my little projects :) Ciao Luca
Molto interessante!
ReplyDeleteQuanto costa?
E' possibile ordinarlo?
Come?
Marco
Ciao, devo finire alcuni test e poi sarà acquistabile .
ReplyDeletePuoi mandarmi una mail a jackdev23 at gmail.com
Il costo Full mounted and tested (no box) = 120 euro
Servono 4 antenne attacco SMA e un ricevitore o rtx non forniti :)
Bello!
ReplyDeleteDal video vedo che è interfacciato al computer, il software è proprietario?
Viene fornito?
E quello per l'Arduino?
Ciao e grazie.
Marco
Ciao Marco, il software per pc è gratuito e scaricabile qui
ReplyDeletehttp://www.pi4wag.nl/index.php/pseudo-doppler-radio-direction-finder
Il software per arduino è propietario, fornisco a richiesta arduino nano già programmato a 20 euro
Hello I am PA3BNX the writer of the SoundDoppler software.
ReplyDeleteCan the antenna switcher disconnected from
the main board or must I use 4 coax cables. One to each antenne of same
length ?
And does it disconnect the antenna and cable so it does not reflect or absorbs antenna energy and disturbs RF field from the near doppler array field ?
Hello PA3BNX, glad to hear from you :)
ReplyDeleteAs you can see in the pcb pictures, you can break the pcb in 2 parts: logic and switches.
If you like to use switches part remotely, you need 4 wire (not coax) to control the switches + 1 coax cable to connect te RX . Clearly, you have to connect 4 antennas with same coax cable length to switches board.
Switches disconnect antenna in off state = does NOT go to 50 ohms load.
Hope this help,
let me know.
Ciao Luca
PA3BNX
ReplyDeleteThe antenna's not terminated if not connected to reciever
so they don't eat and distort the local RF field.
Can I also disconnect the coax shield if I use 4x dipoles as array?
Beause a disconnected dipole just connected to the coax
eats / influences the near RF field by just the Dipole half + coax cable shield
Any element that resonates influcences the near array RF wave front.
Thats highly unwanted situation.
This does not occur with 4 monopoles of 1/4 wave length of course.
If they have sufficient ground plate around them so they are also
omidirectional.
Nice project further
73's
PA3BNX Lodewijk
Hello Lodewijk
ReplyDeleteI think you can find all the answer by checking the datasheets of AS169
http://www.skyworksinc.com/uploads/documents/200105E.pdf
If you like, send me an email and I will send you a pcb or whatever you need to test my little projects :)
Ciao
Luca