DBJ-2

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Specs (from https://edsantennas.weebly.com and https://kbcubed.com:

  • Bands: 2 m and 70 cm
  • Maximum input power: 50 W
  • Impedance: 50 Ohm
  • Gain: 2.1 dBi
  • SWR: less than 1.7:1 for VHF and less than 1.5:1 for UHF


Primary source:


Videos:


Resources for creating a DBJ-2 antenna:


Notes from the activity meeting:

  • SWRs will change when the antenna is vertical or horizontal; only use them when they're vertical
  • Soldering the BNC tips to the conductor can be tricky; if the insulator is getting too much heat, try using a small piece of wet tissue paper on the exposed conductor between the tip and the insulator
  • When crimping the BNC to the feed line, the tight end of the crimp should be on the end of the feed line