I noticed that I get continuity between the 2 antenna conductors (not grounds) for the P2V receiver. I do not for the camera receiver, or for either transmitter antenna. It appears as if there may be something different with the P2V controller receiver? If so, the splitter should work with this antenna anyway, and perhaps both antennas are not even necessary, or at least redundant?
More powerfull repeater?
- Thread starter uncle fester
- Start date
Noël said:Here is my mod.
I wanted the coax between the two units to be as short as possible.
All that needs to be done now is to cleanup the box a bit (remove the letters, the two mounts for the screws and put some kit in the hole where the old coax used to be)...... And.... Test it..
Small note! Polarization might look wrong, but I've rotated the antenna inside the box!
Hey guys I'm thinking of do the mod this way to get rid of the coax. Is there any special I need to do or is it just the one solder on the 9db antenna.
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Ahhh...thanks brushlesshaven for the photo, been dyin' to find out exactly what DJI provided. Difficult to see from the angle of the pic, but may I assume correctly that both sections are hollow tubes, with the center conductor soldered to the upper tube (left), and the shield soldered to the lower tube? I believe this would make it a classic dipole antenna. Curious I don't see a balun around the coax feeder.brushlesheaven said:
iDrone
Here's an updated parts list to my original post. one part was wrong, female to Female SMA Coupler. I now have the correct coupler part link, a SMA Female to RP-SMA Female. These parts will allow you to do the camera antenna mod with out having to take the camera apart with the exception of taking just the cover off. Since I could not find a Male u.fl to Male RP-SMA cable, or a Male to Male U.FL cable. The following 3 parts will get the same basic job done.
The parts are as follows and will be listed with E-Bay links below. a 6 inch male to female u.fl cable. a male U.Fl to Male SMA connector. A Female to RP-SMA Female coupler.
How to do the mod.
Using a 1.5mm hex wrench you will remove the 4 screws on the bottom of the camera. Put a piece of tape over the button so it does not fall off when lifting the cover, first from the back then the front then lifting straight out. You will disconnect the cable plugged into one of the side facing square antennas into the male end of the 6" cable, then the female end into the adapter then screw in the twin female head sma coupler, then your antenna into that. Oh. And you will route the 6" antenna wire through existing vent holes on the plastic bottom so no drilling required. That's it, Easy.
Here's link to my video on the subject. Note, the video shows the wrong female / female sma coupler. I have an annotation noting the correction, The correct parts list is also in the video description as well as below.
https://www.youtube.com/watch?v=O1_nVHSkSdo
Parts List.
Adapter SMA plug male to IPX U.fl male plug RF connector straight M/M
http://www.ebay.com/itm/271217077429?ss ... 1423.l2649
SMA female to RP-SMA Female
http://www.ebay.com/itm/271201499649
Pigtail: U.FL Male to U.FL Female Extension - 6 inches
http://www.ebay.com/itm/300942434456?ss ... 1423.l2649
The parts are as follows and will be listed with E-Bay links below. a 6 inch male to female u.fl cable. a male U.Fl to Male SMA connector. A Female to RP-SMA Female coupler.
How to do the mod.
Using a 1.5mm hex wrench you will remove the 4 screws on the bottom of the camera. Put a piece of tape over the button so it does not fall off when lifting the cover, first from the back then the front then lifting straight out. You will disconnect the cable plugged into one of the side facing square antennas into the male end of the 6" cable, then the female end into the adapter then screw in the twin female head sma coupler, then your antenna into that. Oh. And you will route the 6" antenna wire through existing vent holes on the plastic bottom so no drilling required. That's it, Easy.
Here's link to my video on the subject. Note, the video shows the wrong female / female sma coupler. I have an annotation noting the correction, The correct parts list is also in the video description as well as below.
https://www.youtube.com/watch?v=O1_nVHSkSdo
Parts List.
Adapter SMA plug male to IPX U.fl male plug RF connector straight M/M
http://www.ebay.com/itm/271217077429?ss ... 1423.l2649
SMA female to RP-SMA Female
http://www.ebay.com/itm/271201499649
Pigtail: U.FL Male to U.FL Female Extension - 6 inches
http://www.ebay.com/itm/300942434456?ss ... 1423.l2649
BenDronePilot, I did something similar to you.
Here's my setup. I've easily hit 3,300+ feet with the below setup.
Vision Antenna Mods
Qty 2 http://www.amazon.com/gp/product/B008AGUTPC/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1
Qty 2 http://www.readymaderc.com/store/in...id=813&zenid=7384585c0972055a79df615075443786
Standalone Repeater Setup
Qty 1 http://www.amazon.com/gp/product/B005KP473Q/ref=oh_details_o01_s00_i01?ie=UTF8&psc=1
Qty 1 http://www.amazon.com/gp/product/B00F5V6W1A/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1
Qty 1 http://www.foxtechfpv.com/monitor-battery-p-597.html
Qty 2 http://www.amazon.com/gp/product/B005DCP280/ref=oh_details_o06_s00_i00?ie=UTF8&psc=1
Qty 1 http://www.amazon.com/gp/product/B00FAJF7XQ/ref=oh_details_o03_s00_i00?ie=UTF8&psc=1
Qty 1 http://www.readymaderc.com/store/in...d=1252&zenid=7384585c0972055a79df615075443786
Stock Repeater w/ Antenna Mods
Qty 1 http://www.amazon.com/gp/product/B005UWD0EG/ref=oh_details_o01_s01_i00?ie=UTF8&psc=1
Qty 1 http://www.amazon.com/gp/product/B003CFATNS/ref=oh_details_o01_s02_i01?ie=UTF8&psc=1
Qty 1 http://www.readymaderc.com/store/in...id=814&zenid=7384585c0972055a79df615075443786
Here's my setup. I've easily hit 3,300+ feet with the below setup.
Vision Antenna Mods
Qty 2 http://www.amazon.com/gp/product/B008AGUTPC/ref=oh_details_o04_s00_i00?ie=UTF8&psc=1
Qty 2 http://www.readymaderc.com/store/in...id=813&zenid=7384585c0972055a79df615075443786
Standalone Repeater Setup
Qty 1 http://www.amazon.com/gp/product/B005KP473Q/ref=oh_details_o01_s00_i01?ie=UTF8&psc=1
Qty 1 http://www.amazon.com/gp/product/B00F5V6W1A/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1
Qty 1 http://www.foxtechfpv.com/monitor-battery-p-597.html
Qty 2 http://www.amazon.com/gp/product/B005DCP280/ref=oh_details_o06_s00_i00?ie=UTF8&psc=1
Qty 1 http://www.amazon.com/gp/product/B00FAJF7XQ/ref=oh_details_o03_s00_i00?ie=UTF8&psc=1
Qty 1 http://www.readymaderc.com/store/in...d=1252&zenid=7384585c0972055a79df615075443786
Stock Repeater w/ Antenna Mods
Qty 1 http://www.amazon.com/gp/product/B005UWD0EG/ref=oh_details_o01_s01_i00?ie=UTF8&psc=1
Qty 1 http://www.amazon.com/gp/product/B003CFATNS/ref=oh_details_o01_s02_i01?ie=UTF8&psc=1
Qty 1 http://www.readymaderc.com/store/in...id=814&zenid=7384585c0972055a79df615075443786
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I got 2 directional antennas the 14db tp link ones for my ground station could someone tell me a good antenna to put on the phantom that is better than the stock antenna ?
Bad News, it appears that most of the ARGtek's that we've been sold are fakes. They contain the previous model's board with Realtek chipset. These are actually dual antenna units (500mW each = 1000mW), the center antenna is dead!
See this Video from ARGtek showing the differences;
http://www.youtube.com/watch?v=etB2aCkqU94
Here is a link to the real 1500mW product (Labeled "Power King-X Triple");
http://www.ebay.com/itm/802-11b-g-n-Pow ... 1219758880
See this Video from ARGtek showing the differences;
http://www.youtube.com/watch?v=etB2aCkqU94
Here is a link to the real 1500mW product (Labeled "Power King-X Triple");
http://www.ebay.com/itm/802-11b-g-n-Pow ... 1219758880
I passed on Jason Lee's findings to Docooler for a response, I posted their response here;
http://www.rcgroups.com/forums/showpost ... count=7902
Basically they say that the center antenna works and the 1500mW output is actually conservative.
I wonder what ARGtec thinks?
http://www.rcgroups.com/forums/showpost ... count=7902
Basically they say that the center antenna works and the 1500mW output is actually conservative.
I wonder what ARGtec thinks?
RemE said:
I received the exact response and attachments when I contacted them via Amazon.
Ed, didn't you purchase a SWR tester from Immersion RC ? Can you test yours?
MadMan said:
Yes, I did get a power meter from them, and yes, I will test it tonight and report back.
EDIT - I put the Immersion RF meter on the three antenna terminals and it outputs the same power burst patterns on each output so it appears that Docooler is telling the truth, the center antenna port is in fact active.
Here's an updated parts list to my original post. one part was wrong, female to Female SMA Coupler. I now have the correct coupler part link, a SMA Female to RP-SMA Female. These parts will allow you to do the camera antenna mod with out having to take the camera apart with the exception of taking just the cover off. Since I could not find a Male u.fl to Male RP-SMA cable, or a Male to Male U.FL cable. The following 3 parts will get the same basic job done.
The parts are as follows and will be listed with E-Bay links below. a 6 inch male to female u.fl cable. a male U.Fl to Male SMA connector. A Female to RP-SMA Female coupler.
How to do the mod.
Using a 1.5mm hex wrench you will remove the 4 screws on the bottom of the camera. Put a piece of tape over the button so it does not fall off when lifting the cover, first from the back then the front then lifting straight out. You will disconnect the cable plugged into one of the side facing square antennas into the male end of the 6" cable, then the female end into the adapter then screw in the twin female head sma coupler, then your antenna into that. Oh. And you will route the 6" antenna wire through existing vent holes on the plastic bottom so no drilling required. That's it, Easy.
Here's link to my video on the subject. Note, the video shows the wrong female / female sma coupler. I have an annotation noting the correction, The correct parts list is also in the video description as well as below.
https://www.youtube.com/watch?v=O1_nVHSkSdo
Parts List.
Adapter SMA plug male to IPX U.fl male plug RF connector straight M/M
http://www.ebay.com/itm/271217077429?ss ... 1423.l2649
SMA female to RP-SMA Female
http://www.ebay.com/itm/271201499649
Pigtail: U.FL Male to U.FL Female Extension - 6 inches
http://www.ebay.com/itm/300942434456?ss ... 1423.l2649
The parts are as follows and will be listed with E-Bay links below. a 6 inch male to female u.fl cable. a male U.Fl to Male SMA connector. A Female to RP-SMA Female coupler.
How to do the mod.
Using a 1.5mm hex wrench you will remove the 4 screws on the bottom of the camera. Put a piece of tape over the button so it does not fall off when lifting the cover, first from the back then the front then lifting straight out. You will disconnect the cable plugged into one of the side facing square antennas into the male end of the 6" cable, then the female end into the adapter then screw in the twin female head sma coupler, then your antenna into that. Oh. And you will route the 6" antenna wire through existing vent holes on the plastic bottom so no drilling required. That's it, Easy.
Here's link to my video on the subject. Note, the video shows the wrong female / female sma coupler. I have an annotation noting the correction, The correct parts list is also in the video description as well as below.
https://www.youtube.com/watch?v=O1_nVHSkSdo
Parts List.
Adapter SMA plug male to IPX U.fl male plug RF connector straight M/M
http://www.ebay.com/itm/271217077429?ss ... 1423.l2649
SMA female to RP-SMA Female
http://www.ebay.com/itm/271201499649
Pigtail: U.FL Male to U.FL Female Extension - 6 inches
http://www.ebay.com/itm/300942434456?ss ... 1423.l2649
BenDronePilot said:
Great post and video Ben. I'm so anxious to try this mod but I have to wait to see how my Rotorpixel gimbal fits before I do it. I really like how you chose to mount the antennas through the vibration dampers. That's a nice clean look. I'm hoping there is a way I can mount a skew planer antenna with the RP gimbal so that I don't have to take off the antenna while the P2V is stored in my case. I guess worst case I may just need to hack up my case foam a little.
Scott I'll be looking at mounting sites for a 2.4 and 5.8 skew planar from Horizon FPV when my Rotorpixel gets here next week. I'll do a video showing close-ups of exactly how it fits and likely mount points. Like you I'd prefer everything fits inboard of the skids so it can just slot into the case without having to remove antennas. Having said that it is going to be best that the antennas have as much clear site as possible, so to get that it might be easier to place them differently and just fit before flight.
RemE said:
I have also been in touch directly with Argtek and docooler. My understanding at this time is:
Doccoler have a valid 3 antenna solution using the 8196C IC. This is a 2T2R set up, but Docooler model usues 3 antennas. Antenna 1 and 3 are recieving, and the centre antenna number 2 is transmitting. I have also orderd an rf power meter to check for myself as well, but looks like this is a valid set up. I have stripped mine apart and I have this IC and what looks to be the ingredients for a 3 antenna set up - image atatched of my docooler board. I attached a Yagi antenna to mine yesterday and got out to 1.75KM, but now I know the what the antennas are each doing I may be able to focus the long range antennas a bit better for "listening"
I think Argtek may have some copying issues but it looks like Docooler is not one of them.....but I could be wrong
Another question then arisis. If I have somewhere between 500 and 1000mW on each antenna, and have tried a variety of PV antennas, how come Bendrone has achieved 10,000+ feet with stock repeater with a directional antenna? Could it be that the Docooler is very noisey and the DJI repeater is very quiet in terms of noise? I plan to do a temporary mod to the repaeter and find out for myself as this seems a little odd ? Any ideas anyone :?:
Attachments
Highcloud said:
As I indicated multiple times earlier in different threads, high output power repeater does not help much (may be a little bit) for long range, while RX sensitivity and SNR do help. A good repeater antenna is the key to success. I bet the stock DJI repeater may have pretty good RX sensitivity.
