Build IBCrazy's Cloverleaf - The ultimate circularly polarized aerial antenna! - Page 115 - RC Groups
Thread Tools
Nov 21, 2011, 05:56 PM
Registered User
Quote:
Originally Posted by pdiddyg40
You summed it up pretty well. As long as you have two rights or two lefts, it'll work. What exactly are your issues?
Well, just poor reception in general, even inside a general park sized field. Say 300 yards.
Sign up now
to remove ads between posts
Nov 21, 2011, 06:24 PM
Registered FPVer :)
markus123456's Avatar
Quote:
Originally Posted by daronj
Well, just poor reception in general, even inside a general park sized field. Say 300 yards.
You either must have done something wrong with your antenna build, or - sorry, it happens - your rx and tx are not on the same channel.

May we can see a picture of your antennas?

Markus
Nov 21, 2011, 06:46 PM
Suspended Account
Quote:
Originally Posted by IBCrazy
That is noise floor without a doubt. Something is on your channel. See the fuzz? That's external interference. Circular polarization is not going to fix that. You need a different location or frequency.

-Alex
ok this kind of makes me mad because now I have to make tuned antennas for a different frequency. What should I use?



Nov 21, 2011, 07:05 PM
Registered User
Quote:
Originally Posted by markus123456
You either must have done something wrong with your antenna build, or - sorry, it happens - your rx and tx are not on the same channel.

May we can see a picture of your antennas?

Markus
Must be something wrong with the build. I verified the tx and rx channels.
Nov 21, 2011, 07:13 PM
Engineer for Christ
IBCrazy's Avatar
Quote:
Originally Posted by chatch15117
ok this kind of makes me mad because now I have to make tuned antennas for a different frequency. What should I use?



None of those will do. 3 of them are illegal and one of them has a really high noise floor. Time to switch to 1.3 or 5.8GHz.

-Alex
Nov 21, 2011, 07:29 PM
Team White Llama!
gundamnitpete's Avatar
Quote:
Originally Posted by chatch15117
ok wow... I went out this morning and it was complete garbage. I think it's because I was parked next to a 7 story building. I think the RF was reflecting off the building and was causing really bad multipathing.

So note that any structures near you really do make a difference!!! I'll look for a new place to fly that's far away from any buildings.

Skip to 3 minutes and you can see that my range is exactly the distance of my receiver to the building.

http://www.youtube.com/watch?v=taXy6cBpHtk



I chose that spot because the sun was in my eyes. Normally I go out in the evening but I wanted to try out my new firmware on the OSD ASAP
you are transmitting on an aircraft navigation beacon band. Who would have thought, they would transmit on a frequency approved for their use
Nov 21, 2011, 08:25 PM
Suspended Account
I'll try them all then lol. Starting with 1010MHz.
Nov 21, 2011, 09:38 PM
Team White Llama!
gundamnitpete's Avatar
you'll prolly get shot out of each buddy. I personally would switch back to 910mhz, your CL is prolly wideband enough to work well at this freq, and drive a bit further away from the airport for a flying site.
Nov 21, 2011, 09:42 PM
Suspended Account


New flying location. I'll be throwing it off the top portion of that boathouse.
Nov 21, 2011, 10:00 PM
Team White Llama!
gundamnitpete's Avatar
FPV is more fun when you go new places anyway, atleast IMHO.
Nov 21, 2011, 10:21 PM
Flying low is expensive.
pdiddyg40's Avatar
Quote:
Originally Posted by chatch15117
ok this kind of makes me mad because now I have to make tuned antennas for a different frequency. What should I use?

Quote:
Originally Posted by gundamnitpete
you are transmitting on an aircraft navigation beacon band. Who would have thought, they would transmit on a frequency approved for their use
And to be fair, those were never really tuned antennas for 1040. They were just antennas built really to 1040 specs. Tuning requires equipment that I (and I'm assuming you) don't have.

I agree with gundamnitpete, though. FPV is about the adventure for me. I've seen a bunch of your videos and they all appear to be of the same field. Get out and explore a bit. A new location give you stuff to check out and different places to fly to.

Oh, and I understand that some people do transmit on illegal channels. Is it the right thing to do? Prolly not. But it certainly irks me when they complain about getting noise and interference from the things that are allowed to use that channel! You're not supposed to be transmitting on that to begin with.
Nov 21, 2011, 11:38 PM
Registered User
Kerbob's Avatar
I've had this post bookmarked for about 6 months now and finally got around to modding my FatShark Aviators. I just wanted to let you know that the exact same resistor exists in the aviators and, if you remove it, the goggles work fantastic with the Skew Planar (SP) antenna. Thanks Sanders. Before this mod.. I would see a black screen (instead of the normal static) as soon as my SP touched the SMA connector. See my modded Fatshark Goggles photo below.

Another question I had that I couldn't find the answer to is.. will the Goggles still work with the old rubber ducky after the mod is done or will I have to use SP/CL going forward. The good news is that I can still use the OEM rubber duckys. I don't know if range was impacted.. If it was, it's not too significant.

Quote:
Originally Posted by Klaassie
I have no doubt about the skills and knowledge of Alex, and I used to believe him on his words, but on this case I experienced that he got it wrong!

I have an 5.8Ghz Airwave video-Rx which I planned to use with a CL/SPW combo.
Yesterday I wired everything up, but ended up with the conclusion that this Airwave receiver doesn't like CL/SPW antennas. The receiver worked fine with standard whip-antenna or even (in close range) without antenna, but when I attached a cloverleaf (made by Alex) the reception was totally gone!
I recently lost a plane, using Foxtech 5.8Ghz with standard whip antennas, and since I don't dare to fly with this type of antennas on 5.8Ghz anymore. So I desperately want the CL/SPW antennas working on my Video-Tx/Rx!

Thanks to Sander (SSassen) who came with a workaround, I got it working now! The only thing I had to do is to remove a little SMD-resistor from the Airwave module. Apparantly the antenna-connection of this module is DC-powered, to feed an LNA. Because an CL/SPW antenna is a short for DC-power this type of antennas doesn't work on this Airwave module.
But (luckily!) the circuit for DC-powering the antenne can easily be interrupted by removing a particular SMD-resistor!
Sander pointed this out for me, and in a few minutes I got this working! Thanks to "his royal sassiness"!

Maybe this isue is worth to be noted in the startpost?

The pictures show which component has to be removed:


Removed:


Working now:
Last edited by Kerbob; Nov 21, 2011 at 11:58 PM.
Nov 21, 2011, 11:56 PM
Suspended Account
Quote:
Originally Posted by Kerbob
I've had this post bookmarked for about 6 months now and finally got around to modding my FatShark Aviators. I just wanted to let you know that the exact same resistor exists in the aviators and, if you remove it, the goggles work fantastic with the Skew Planar (SP) antenna. Thanks Sanders. Before this mod.. I would see a black screen (instead of the normal static) as soon as my SP touched the SMA connector. See my modded Fatshark Goggles photo below.
http://www.hobbyking.com/hobbyking/s...Receiver_.html

http://www.hobbyking.com/hobbyking/s...er_600mw_.html

^^ is that your setup? I am looking to switch from 200mW 900MHz to 5.8GHz. Would you recommend getting it from hobbyking or is there a better quality tx for the same price or less?
Nov 22, 2011, 12:01 AM
Team White Llama!
gundamnitpete's Avatar
Quote:
Originally Posted by chatch15117
http://www.hobbyking.com/hobbyking/s...Receiver_.html

http://www.hobbyking.com/hobbyking/s...er_600mw_.html

^^ is that your setup? I am looking to switch from 200mW 900MHz to 5.8GHz. Would you recommend getting it from hobbyking or is there a better quality tx for the same price or less?
if you have the 12channel RX with a digital display, it would work for 1280mhz.

1280 uses the same connector as your current 900mhz setup. All you gotta do is pull the plug out of your 900mhz TX, and pop it into a 1280TX.

easy frequency change
Nov 22, 2011, 12:26 AM
Suspended Account
So you think 1280 is better? I'm already on 1040. I thought 5.8GHz would be best.

Cularis FPV 4000 Feet! (8 min 31 sec)


After watching that I'd like a higher power setup since he got that far away on a 72MHz setup. He did have 1300@300mW for that with a patch antenna though

When people say 1.3GHz do they really mean 1280MHz or are there separate 1.3GHz Tx that I have not seen?


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Mini-HowTo Fast Patch - IBCrazy's easy DIY patch antenna IBCrazy FPV Talk 361 Sep 28, 2017 12:06 PM
Mini-HowTo Circularly Polarized Helical antenna 7.5 -13 dbi - New: Wave Trap match! IBCrazy FPV Equipment 2438 Sep 18, 2017 09:25 PM
Mini-HowTo IBCrazy's DIY antenna tracker!!! IBCrazy FPV Equipment 463 Apr 27, 2017 05:46 PM
Build Log IBCrazy's Minion - The ultimate FPV plane IBCrazy FPV Aircraft 151 Apr 19, 2013 11:04 PM
Build Log IBCrazy's homebrew antenna tracker IBCrazy FPV Talk 48 Oct 25, 2012 06:07 PM