Just got a 5bi antenna


#1

Hi,

I just got one of these and switched it with the antenna I got with my RTL-SDR and the range has gone right down.
Is there anything I can do/modify to get a better range?

Thanks for any advice.


#2

colinear coaxial (coco) antenna

use more short cable or LNA



#3

I bought a couple of those on Amazon and sent them right back for refund.

JUNK!!


#4

I also bought those, and found that they had far worse reception than my home built antennas. I have made and tested quite a few, but two designs have stood out far above the rest.

  1. cantenna: Advice for my Cantenna setup w/ outdoor enclosure
  • easy to build
  • good range (I get over 150nm consistently, and 200+ occasionally with it in a second story window, and many obstructions around. )
  • kind of fragile/hard to mount
  • ugly
  1. J-pole: http://www.lll.lu/~edward/edward/adsb/antenna/ADSBantenna.html and the calculator here: https://m0ukd.com/calculators/slim-jim-and-j-pole-calculator/
  • not quite as easy to build (I ordered some semirigid coax off amazon)
  • spectacular range (I now consistently get 200nm+, and my messages per second were double what I got from the cantenna
  • super durable
  • inconspicuous

The cantenna is dead easy to build, and gets about 4x the messages per second that those junk rubber duck ones do. I can’t recommend the J-pole enough though. I was shocked at how well it performed. It gets another 2x messages per second than even the cantenna at my location.


#5

I get great results from the telescopic antenna included in this bundle. I keep it fully retracted so that it is set at about 5.5" which is 1/2 wavelength for 1090 Mhz.

http://www.nooelec.com/store/nesdr-smart.html


#6

One other consideration: I believe that the stratux people claim you need a pretty good ground plane to get the rubber ducky antenna working well. My package included a big strip of copper tape to make the ground plane. you might try using it with yours to see if it improves the situation. I tried the copper tape, and then a 4x4 inch square of copper, and neither seemed to have any effect, but YMMV.