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View Full Version : New product: The dual-link



HugeOne
22nd April 2013, 01:36 PM
Here's yet a new thing at TrueRC: The 1280MHz "dual-link". Like the quad-link, but to match two antennas instead of four. I made it for an interesting use: To convert a Gatling into a pepperbox antenna by replacing part of the matching network. Just unscrew either the two left or two right elements and screw the dual-link. (be sure to mark your connector to put them back at the same place.) Your Gatling will then turn into a 13dB pepperbox, usefull at the field in case your tracker let you down :)

http://www.truerc.net/images/duallink.JPG


To conver the gatling into a pepperbox, simply unscrew two elements like shown here:

http://www.truerc.net/images/gatpepper1.JPG


And place the dual-link on the two disconnected elements:

http://www.truerc.net/images/gatpepper2.JPG

http://fpvlab.com/forums/ http://www.truerc.net/images/gatpepper2.JPG
Half of the gatling is now a pepperbox with 3dB less gain but four times the beam width.

Ultimately, the other half could be converted to share with a friend using 1258/1280.

Q&A:

-Can I use it to stack two omnis and make a horizon style antenna?
>>Yes and no, if you place them both pointing up and 7-8" distance one above the other and

both have exact same coax length, then yes.

-Can I stack two directional antennas such as helicals or crosshairs?
>>Again a delicate question; it can, but both antennas need to be in the exact same

orientation with exact same cable length and exact same number of turns in case of a helical.

In other words: two cloned antennas spaced by about 3/4 to 1 wave apart.

-Can it be used to connect two RXs to the same antenna?
>>No.

-How much?
>>30$


-Hugo