DIY CP FPV Antennas - Build Instructions

Selling a pair of these on eBay:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280831589534#ht_500wt_...


First and foremost, my thanks go out to IBCrazy (RCGroups) / CAGreve1231 (YouTube), the inventor of this antenna! Check out his blog at RCGroups here: http://www.rcgroups.com/forums/showthread.php?t=1388264

Check out: www.rcexplorer.se

Materials:
- 0.035" MIG Solid Wire
- "Wifi extension cable" from eBay with RP-SMA connector
- Solder, soldering iron, digital caliper, wire cutter, wire stripper, metal file

Category:

Science & Technology

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[Malle743]

thank you for this video this helps a lot :-d

[schraut5]

@Malle743 No problem!

[GNiessen]

Wouldn't it be important to straighten the wire before measuring it?

[schraut5]

@GNiessen Totally, I have made a few changes to the way I make these antennas now. I use smaller wire, I straighten the wire ahead of time, RG316 wire, smaller feed gap. But yes, straightening is key to get the best results

[CAGreve1231]

As the inventor of this antenna, let me tell you your build looks great. However you have a few things inaccurate:

1. 0.035" is the incorrect wire size for 5.8GHz. It must be scaled down just as all of the other dimensions.

2. RG174 has terribly high loss at 5.8GHz. I suggest RG316.

3. You MUST trim the lobes short by the length of your feed gap. Your feedgap counts towards the lobe length.

-IBCrazy

[mmmbcn]

very helpful, thanks!

[schraut5]

@hakank1 Great! Hope they bring you much joy with your FPV. I love Chicago, its a great city and June is a great time to visit

[schraut5]

@FuttFel Hi! I sent you a message

[FuttFel]

Hm. When I soldered the joints I got some solder between the the shield and the inner cable. The antenna gives me a picture, but I'm not sure what effect this has on the range...

[hakank1]

@schraut5 Antennas arrived, nice work!

Noticed you're living in Chicago. . I had the opportunity to visit Chicago for some days mid June last year. A very great town!

Again, thanks for the good work.

/Håkan

[schraut5]

@441rider You can build them! Not too hard!

[441rider]

I took gold plated wire off what I think was a ferrite core coil on a macintosh circa '97 There are 3 of them, lots of high grade salvage stuff for rc in old puters. Best to use silver solder. Great vid, saw your auction but I am broke after ordering my 200w 5.8!