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12 sty 2021 · If you can, try putting up a dipole antenna, or a variation of a dipole antenna that's fed in or near the middle, with a good balun. Raising the coax to the center of the antenna might be tricky, and you might need an antenna tuner to get a good SWR, and you might not have very many bands; but you'll be amazed how much better it works than your ...
23 sty 2022 · I've got my first real lessons in antennas repair... The mfj-1982 efhw antenna had suddenly got a real high swr.. Checked all connections, coax front to bac ...more. I left out the long...
3 wrz 2017 · I have compared EFHW-8010 (which looks very similar to MFJ) versus full size inverted V wire dipoles (all antennas had their top 14 m off the ground) on 80/40/30/20 m with a WSPRlite beacon. Results were quite interesting: similar on 80 m, slightly lower on 40 & 30 m, rather poor on 20 m.
End-Fed Horizontal Wires (EFHW) cover multiple bands with-out traps, stubs, or resonators. End-fed radiators have the unique quality of resonating on the 1/2-wave fundamental frequency plus odd/even harmonics above! Broad-band matching transformer at feed point lets the entire HF spectrum be yours!
20 cze 2022 · Rating: 2023-04-03. Works as advertised until it broke. Time Owned: more than 12 months. Update: After two years of reliable service my MFJ-1984 stopped working and it took 5 months for MFJ service in Tennessee to repair ATU ($91/shipped back)....
Having read up on EFHW antennas and I believe the issue is common-mode current travelling back down the coax cable and causing substantial radio frequency interference in my room.
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