TWO-BAND DESIGNS TWO-BAND DESIGNS Bands Radiator Ladder Line Lower Resonance Upper Resonance Length (ft) Length (ft) Freq (MHz) SWR Freq (MHz) SWR VF = 0.975/40 144.83 89.50 3.87 1.8 7.25 1.6 30/17 54.75 36.17 10.12 1.8 18.12 1.3 20/17 77.67 76.17 14.13 1.7 18.11 1.6 20/15 51.00 50.67 14.17 1.1 21.27 1.2 20/12 68.00 46.67 14.15 1.7 24.92 1.5 17/12 28.58 46.67 18.11 1.6 24.95 1.5 17/10 …
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- IARU Announces HF Digital Mode Band Plan Review August 14, 2020An International Amateur Radio Union (IARU) working group has been formed to develop solutions to reduce congestion within very popular mode segments while preventing mutual interference between “incompatible modes” as much as possible. The working group includes representatives of the three regional band-planning committees, marking the first time the IARU three regions have joined together […]
- The K7RA Solar Update August 14, 2020Tad Cook, K7RA, Seattle, reports: New Sunspot Cycle 25 continues to make a strong showing. Sunspots have appeared on every day for more than 3 weeks. Average daily sunspot numbers for the week slipped a bit from 19.6 to 14.3 this week, but average daily solar flux increased from 72.8 to 73.8. Geomagnetic indicators remain […]
- Intrepid-DX Group Announces Winners of Youth “Dream Rig” Essay Contest August 13, 2020The Intrepid-DX Group has announced the winners of its first annual Youth “Dream Rig” Essay Contest. “We received over 60 essays from young amateurs from all over the world,” said Intrepid-DX Group President Paul Ewing, N6PSE. “The essays were unique in thought and very well-articulated. Extra points were given for proper grammar, punctuation, and spelling. […]
- QSO Today Virtual Ham Expo to Become Twice-Yearly Event August 13, 2020
- US Department of Defense to Share 3450 – 3550 MHz with 5G Commercial Operations August 12, 2020
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