WebFor a base station, this can be achieved using a permanent mast and an outdoor antenna. For a portable station, you can mount a vertically oriented wire antenna such as the DBJ … http://hn.zgjct.com/2974216
Ed Fong DBJ-1 GMRS/FRS MURS Base Antenna (dual band
Webwhy they choose the DBJ-1, the most com-mon answer was value. When budgets are tight and you want a good performance-to-price ratio, the DBJ-1 (Dual Band J-pole–1) is an … old photos of ipswich suffolk
1. Romex Dual-Band J-Pole Antenna - DARA Thursday Night Group
Weballoy information technical information on common & specialty alloys in60/sn40 118-122 1.10 0.67 0.53 5.5 sn42/bi58 138 9.71 6.03 3.73 1.3 sn43/pb43/bi14 144-163 5.60 3.60 2.77 2.5 Webthe principles of the DBJ-1 can be extended to a portable roll-up antenna. Since it is the second version of this antenna, I call it the DBJ-2. Principles of the DBJ-1 The earlier DBJ-1 is based on the J-pole,2 shown in Figure 1. Unlike the popular ground plane antenna, it doesn’t need ground The DBJ-2: A Portable VHF-UHF Roll-Up WebConfiguration: 1/2 wave radiating element Maximum power: 75 watts SWR: less than 1.5 to 1 over a 3 MHz bandwidth and less than 1.7 :1 over 4 MHz bandwidth. Gain: 2.1 dBi Impedance: 50 ohms UHF (440-450 MHz) ham model (460-470 MHz) commercial model Configuration: 1/2 wave radiating element Maximum power: 75 watts old photos of irvine ky