Transmit Antennas — Technical Articles
This section covers wire antennas from fundamentals to advanced tuning: doublets, EFHWs, slopers, inverted‑Ls, and more. You’ll find practical build/tune guidance, comparisons, and myth‑busting grounded in measurements and field experience. Items are datestamped so you can see when guidance was last reviewed.
Wire Antennas
- [2025-08-12] Fold‑Back Antenna Tuning – SWR & Resonance Guide
- [2025-07-29] Doublet Antenna Tuning – Best Methods for HF Ham Radio
- [2025-07-15] Z‑Match vs AH‑705 Tuner Efficiency for HF Doublet Antennas
- [2025-07-01] Linked Dipole vs 13 m Doublet – HF Antenna Comparison
- [2025-06-20] Doublet Antenna Guide – Smart Feeding for Multiband HF
- [2025-06-05] Wire Antenna Geometry – Sloper, Flat‑Top & Inverted‑L
- [2025-05-22] Optimal NVIS Antenna Heights for Reliable HF Coverage
- [2025-05-06] Inverted‑L Antenna Spacing Guide for HF Performance
- [2025-04-21] Asymmetric Inverted‑V Fix — UNUN + Counterpoise Guide
- [2025-04-05] Leveling Wire Antennas on Slopes: Horizon vs. Ground
End Fed Wire Antennas
- [2025-08-01] End‑Fed Antennas Explained
- [2025-07-18] Using an Antenna Analyzer for End‑Fed Antennas with Coax as Counterpoise
- [2025-07-02] Feed‑Point Impedance vs. Height for End‑Fed Antennas
- [2025-06-14] Why an External Tuner Helps Short/Multiband Wires
- [2025-05-29] Optimizing End‑Fed Antennas with High‑CMR Chokes
- [2025-05-13] Why a Tuner Is Essential with Multiband Wires & Solid‑State Amps
- [2025-04-25] Understanding the Counterpoise in 4:1 and 9:1 Antennas
- [2025-04-08] Why We Prefer a 4:1 UNUN for Wideband Multiband Wires
- [2025-03-23] The Hidden Truth About the Counterpoise
- [2025-03-07] Antenna Current Distribution & Performance
- [2025-02-19] Ground Lug Role in EFHW Flat‑Top, Inverted‑L, Vertical
- [2025-02-03] Ground Lug on EndFeds in RX — The Overlooked Factor
Directional Monoband HF Wire Antennas
- [2025-07-11] Directional Wire Antennas for 20–40 m: Bobtail to Half‑Square
- [2025-06-27] Why the End‑Fed Half‑Square Is a DX Game‑Changer
EFHW — End‑Fed Half‑Wave Wire Antennas
- [2025-08-06] The End‑Fed Half‑Wave Myth — Why Most EFHWs Get It Wrong
- [2025-07-22] EFHW Transformers: The “Magic Capacitor” Trap
- [2025-07-05] Why “Wideband” 49:1 Transformers Aren’t Truly Wideband
- [2025-06-18] Back‑to‑Back EFHW Transformer Measurement Myth
- [2025-06-01] Multiband EFHWs & Ferrite Losses — The Real Challenges
- [2025-05-16] Measuring SWR & Resonance on an EFHW
- [2025-04-29] Coax Length Before the Choke — Why It Matters
- [2025-04-13] Why EFHWs Are Inherently Unstable (Especially on Low Bands)
- [2025-03-25] EFHW Below 20 m — Popular, Easy, and Mostly Useless
- [2025-03-10] EFHW Verticals on 10 m, 12 m, and 15 m
- [2025-02-20] Why Purpose‑Built EFHW Transformers Work Better
- [2025-02-02] EFHW Transformer Losses — A Reality Check
- [2025-01-15] T2LT — The End‑Fed Dipole That Looks Like a Dipole
- [2024-12-22] Antenna Tuners for End‑Fed & Longwire — Myths and Realities
Non‑Resonant Traps
- [2025-07-25] The Power of Non‑Resonant Traps — A Smarter Way to Multiband Dipoles
- [2025-07-07] Nextgen NRTs — Performance Through Symmetry
- [2025-06-19] FullHalfWave Series (EF FHW): Dual Half‑Wave EFHWs for Real‑World DX
- [2025-05-31] Non‑Resonant Trap Calculator for Dipoles & EFHWs
- [2025-05-12] NRTs and Their Simulation in NEC Tools
Vertical Antennas
- [2025-08-08] Why Clever Antenna Trickery Doesn’t Always Pay Off — A Real‑World Test
- [2025-07-19] Multiband Fan Verticals — Why Mutual Coupling Isn’t a Big Deal
- [2025-07-02] Reducing Mutual Coupling in 1/4‑Wave Fan Verticals
- [2025-06-14] Short Radials — Misreading Rudy Severns’ Work
- [2025-05-28] Feedpoint Placement on 1/4‑Wave or 5/8‑Wave
- [2025-05-09] Why the RF.Guru VertX206 Fan Vertical Radiates Smarter
- [2025-04-24] “Mythbusting the Mythbusters”: 1/4 & 5/8 Verticals Don’t Work the Same
- [2025-04-06] Efficient Multiband Verticals with a 4:1 UNUN
- [2025-03-22] Why Thick Aluminum Tubes Beat Thin Wire
- [2025-03-05] Why 1/4, 1/2 & 5/8 Ground‑Mounted Verticals Perform the Same
- [2025-02-16] Raised vs Ground Radials — Height Wins (15/17/20 m)
- [2025-01-30] Thick Tubing vs Wire in Verticals — Why Conductor Size Matters
- [2025-01-12] Vertical Antennas: Horizontal Clearance & DX Success
Best Single‑Element Monoband Omnidirectional Antennas
- [2025-06-22] Verticals for DX — Why Size & Shape Matter by Band
- [2025-05-30] Omnidirectional Short‑Skip Antennas for Local Contacts
- [2025-05-12] Vertex‑Fed Delta Loop vs V Dipole for Short‑Skip (Inter‑EU)