I have found that resonant antennas work best for me: on HF or VHF+.
I have a 80/40m dual inverted-V with apex at 45-feet and 80m ends at 22-feet that works very well out to 800-miles (so I would consider it good NVIS and moderately good for longer distance). It is fed with a current balun and coax cable. I use a MFJ-945E tuner to improve matching off center frequency: 3920 & 7150 KHz. Some years ago I had a 252-foot 160m dipole, but it was too close to ground for a decent radiation angle (top loaded verticals seem better for the top band).
Before setting up my Hygain TH3mk4 triband yagi, I also used a 20m dipole. I have a 10m/6m dual-band J-Pole which is resonant on my favored frequencies and again can be tuned using the antenna tuner to extend off frequency.
I use a 43x122-foot Inverted-L with base loading coil on 502-KHz. I plan to try tuning it for 160m, as well. The antenna is resonant with base-loading over a 5-KHz bw, although extremely short on 600m (quarter wave = 490-feet); radiation resistance =0.8 ohms.
Thus I avoid high SWR on transmission lines (<3.5:1). 73, Ed - KL7UW I run 100w on 502-KHz, and up to 270w on 160-10m using either the K3 or KX3. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
