New node w/ odd antenna

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k5ted
Posts: 10
Joined: Fri Dec 25, 2015 2:53 am

New node w/ odd antenna

Post by k5ted » Fri Dec 25, 2015 2:56 am

Running VR with Dump1090 on a Noelec 820T2 blue stick, on an Intel Compute Stick near KSAT, with this antenna:

http://www.ebay.com/itm/Maxrad-800-MHz- ... 1348635313

Not bad for a $8 antenna. Will be trimming it down to 1090 soon.

http://99.5.213.235:8088/virtualradar/desktop.html#

Note: Trimming done. Did not notice a significant difference between the trimmed and an untrimmed one in A/B comparison.

However, if you decide to try this antenna and want to trim it down, I took one completely apart and got the dimensions so you don't have to:

1. Radiator is pressed in to the hardline center. DO NOT ATTEMPT TO TWIST AND REMOVE IT. Trim it in place. It protrudes 81mm from the center conductor (measured with cover off) Remove the black plastic bootie and trim accordingly from the tip. (13mm for a 68mm adjusted length)

2. Ground Radials are 84mm long and threaded into the aluminum base ring, measured observing the three to 4 threads left exposed. Remove the black plastic bootie and trim accordingly from the tip. (16mm for a 68mm adjusted length)

If you insist on taking it apart to see the guts, after the three radials are removed, the assembly slides out of the cover. It is a bit fiddly to get the threads all lined up when putting it back together. Remember this is aluminum, so be gentle.

k5ted
Posts: 10
Joined: Fri Dec 25, 2015 2:53 am

Re: New node w/ odd antenna

Post by k5ted » Sun Jan 03, 2016 12:19 am

added the FlightAware filter today. Seeing improvement. So far, the trimmed MaxRad groundplane beats the collinear and the Franklin hands down.

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