Hi to all,
this is my first post so nice to meet you.
I'm asking help because something strange is happening with my new coaxial antenna...
I've a raspberry 3 (maybe 2b I don't remember) with R820T dongle... whit default antenna that came with dongle all it's working fine, more ore less 60 nm of bearing.
I've built a collinear antenna with coaxial cable (12 segments), the antenna is ok, no short circuits, but.... when I attach the new antenna to the dongle the FR24 Feeder Status page drops to ZERO aircraft.
The weid thing is that if i connect the dongle to my Samsung smartphone and I run AVARE ADSB app I can see a lot of aircrafts ! The message rate showed on AVARE is more or less 12 message per second...
So, if I connect the dongle to Raspberry.. zero aircraft... if I connect same dongle with same antenna to smartphone a lot of traffic on AVARE ADSB.... why ?
my configuration :
I've checked all the cables, no short circuits at all, all the solders are ok.
Can you help me please ?
Thanks to all !
this is my first post so nice to meet you.
I'm asking help because something strange is happening with my new coaxial antenna...
I've a raspberry 3 (maybe 2b I don't remember) with R820T dongle... whit default antenna that came with dongle all it's working fine, more ore less 60 nm of bearing.
I've built a collinear antenna with coaxial cable (12 segments), the antenna is ok, no short circuits, but.... when I attach the new antenna to the dongle the FR24 Feeder Status page drops to ZERO aircraft.
The weid thing is that if i connect the dongle to my Samsung smartphone and I run AVARE ADSB app I can see a lot of aircrafts ! The message rate showed on AVARE is more or less 12 message per second...
So, if I connect the dongle to Raspberry.. zero aircraft... if I connect same dongle with same antenna to smartphone a lot of traffic on AVARE ADSB.... why ?
my configuration :
- raspberry with FR24 software
- R820t dongle with usb extender cable of 1mt
- mcx to BNC pigtail cable
- BNC to F cable to the roof (2 mt of cable)
- F-female to F-female adapter
- Collinear coaxial antenna made of 12 segments terminated with F-male connector.
- Cable used : SAT 703B 75Ohm loss : 1000Mhz : 18,50Db/100m
- Pole installed on the top of the building, 1mt of space from TV Antenna at the same height
I've checked all the cables, no short circuits at all, all the solders are ok.
Can you help me please ?
Thanks to all !