Antenna efficiency hf amateur

Built this ghetto rigged junction box with a 5.8 DBi antenna last night

HF Walkie Talkie Ham VHF UHF Tri-Band Amateur Two Way Radio Antenna Combiner MX72 60-100W Linear Antenna Duplexer

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Hi everyone, not sure Im in the right place for this, but my parents recently bought a house in the USA which had this rather large antenna (about 50 feet/15 meters) 3024x4032 image

Hi everyone, not sure Im in the right place for this, but my parents recently bought a house in the USA which had this rather large antenna (about 50 feet/15 meters) photo

Hi everyone, not sure Im in the right place for this, but my parents recently bought a house in the USA which had this rather large antenna (about 50 feet/15 meters) 3024x4032

HamGeek QRM Eliminator X-Phase Second Generation 1-30MHz HF Bands Ham Radio Uses 1600x1600

Exercise under heat stress thermoregulation, hydration, performance implications, and mitigation strategies Physiological Reviews

Listen to This Week in Amateur Radio podcast Deezer

My ad-hoc VHF indoor antenna r/amateurradio 1512x2016

HF Discone at the Titan Missile Museum r/amateurradio 1200x1600

HamGeek QRM Eliminator X-Phase Second Generation 1-30MHz HF Bands Ham Radio Uses 1600x1600 image

Cells Free Full-Text Generation of Human Regulatory Dendritic Cells from Cryopreserved Healthy Donor Cells and Hematopoietic Stem Cell Transplant Recipients

YAGI Gamma Antenna 9 Elements UHF 350-500Mhz Tunable 430-450Mhz SO239 Mobile Radio Repeater Base Station Signal Boost Antennas 1200x1200

Amateur radio direction finding

General Ham Exam with Comments (2023-2027) by Josip Medved photo

PDF) Cylindrical Antenna Theory for the Analysis of Whole-Body Averaged Specific Absorption Rate 850x1134 picture

Taxed from r/amateurradio because it belongs here more r/tacticalgear 1162x826 picture

1.8MHz-50 MHz 0.5W-120W SWR HF Short Wave Standing Wave Meter SWR Power Meter OLED FM AM CW SSB With Battery

HamGeek QRM Eliminator X-Phase Second Generation 1-30MHz HF Bands Ham Radio Uses 1600x1600 pic

Mini1300 Antenna Analyzer 0.1 ~ 1300mhz Full Band Vector Vna Usb Charging - Diagnostic Tools photo

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Wearing mag loop safe for HF QRP? r/amateurradio image

Antioxidants Free Full-Text Impact of Physical Exercise on Platelets Focus on Its Effects in Metabolic Chronic Diseases 3222x2720

On gender imbalances in Ham radio, and why I will no longer use the term YL r/amateurradio

SE-X80 wideband vertical HF antenna now installed at home