Haze said:
Highcloud said:
Hi all. This is my ground rig. I have upgraded antennas to 2 x 9 DBI omnis, fed by 2 x 2000mW amps fed by lightbridge. All driven by 12 v 10000mAh li-ion battery. Standard wire omnis on the pv2. So far achieved 4 km at full 1080p resolution with near zero lag. Video feed goes to hdmi cable to 24 inch monitor inside, so no sun glare and no iOS limitations on video.
Important to note that the antenna spacing is around 7 inches to avoid distortion of 2.4 Ghz wave length between antennas. Can probably go further, just a matter of battery and nerves
Hope this is useful for distance chasers !
u wanna give us a exact parts list? i would appreciate that. would love to spec it out and maybe get.
PARTS LIST
2 X Alfa 9 dbi Omni directional antennas. RP-SMA 2.4 Ghz
2 x Sunhans 2000mW 2.4 Ghz amplifiers
2 x SMA plug to SMA plug pigtail 150 mm long
1 x 1 or 2 way switch rated at 3 Amps or better
1 x 12V battery of your choice. I have now changed mine to 2200mAh 3 S Li-Po (Turnigy) This will give around 4 hours flying between charges.
HOW TO ASSEMBLE
Connect 2 x SMA to SMA cables between the antenna port on the Light Bridge and the radio side of the Sunhans amplifiers
Screw on the RP SMA Alfa Antennas to the Sunhans Amplifiers on the Antenna side.
Space the Amplifiers around 180 mm apart – this will avoid 2.4 Ghz signal distortion
Cut the Light Bridge power supply cable around 200 mm form the round connector
Cut the power supply cables for the Amplifiers around 200mm from the round connector end.
Splice all three power cables (2 x amplifiers and 1 x Light bridge) together – take care to connect centre pin positive for all connector
Connect spliced positive wires to one side of switch
Connect other side of switch to +ve of battery
Connect –ve side of power cables to –ve of battery.
The switch is a precaution against spiking when you connect and disconnect the battery. Always connect and disconnect with the switch in the off position
I used Makrolon as a base to mount everything and then mounted on a removable pole head.
As I have a mast that is 5 metres high outside and a monitor inside, I use 10 metres HDMI cable for video feed. 10 Metre USB extension (in case I want to edit settings in the Light Bridge App while flying). I used a standard 3.5mm phono extension for the transmitter control cable and finally I added 2 sense wires (0.5 mm csa or better will do) for battery measurement, so that I can monitor the power supply at the top of the tower while flying – anticipating in good time any likely loss of power. I used expandable cable netting to cover all the cables for the first 7 Metres and then let them loose for the rest of the way to the monitor, TX etc. This enables me to fly fpv inside – avoiding all daylight and sun glare but I still have enough control cable to step outside for landing and take off.
Hope this helps everyone.