Skip to content

Ham Radio . Magnum Experimentum

Antennas, experiments, engineering and other articles of interest to radio folks.

  • Home
  • Radio Shorthand
    • Morse Abbreviations
    • Morse Code
    • Phonetic Alphabet
    • Q Signals
    • RST Signal Report
  • Tech Talk
    • Antenna Gain
    • Antenna Counterpoise
    • Digital
    • Logging Software
  • Amateur Radio, Why?
  • About
    • Privacy Policy
    • Terms and Conditions
    • Request Account
    • Contact
    • Sitemap
    • Advertise
  • Subjects
    • Activities
    • Antennas
    • contesting
    • Connectors
    • Digital Modes
    • EmComm
    • Installations
    • interfaces
    • Introspection
    • Lab Shootouts
    • Miscellaneous
    • mobile
    • NEC Shootouts
    • News
    • Operating Tips
    • power supply
    • Accessories
    • Promoting
    • Propagation
    • Public Service
    • Radios
    • Repair
    • Reviews
    • Safety
    • Software
    • station
    • Test Gear
    • Tomfoolery
    • Whackers
  • Home
  • Radio Shorthand
    • Morse Abbreviations
    • Morse Code
    • Phonetic Alphabet
    • Q Signals
    • RST Signal Report
  • Tech Talk
    • Antenna Gain
    • Antenna Counterpoise
    • Digital
    • Logging Software
  • Amateur Radio, Why?
  • About
    • Privacy Policy
    • Terms and Conditions
    • Request Account
    • Contact
    • Sitemap
    • Advertise
  • Subjects
    • Activities
    • Antennas
    • contesting
    • Connectors
    • Digital Modes
    • EmComm
    • Installations
    • interfaces
    • Introspection
    • Lab Shootouts
    • Miscellaneous
    • mobile
    • NEC Shootouts
    • News
    • Operating Tips
    • power supply
    • Accessories
    • Promoting
    • Propagation
    • Public Service
    • Radios
    • Repair
    • Reviews
    • Safety
    • Software
    • station
    • Test Gear
    • Tomfoolery
    • Whackers

S11

Copper efficiency after weathering

July 4, 2021
KX4O Small Transmitting Loop

I use a weathered copper small transmitting loop to see if copper oxide affects antenna conductivity and hence efficiency.

Categories Antennas Tags bandwidth, copper, oxidation, oxide, S11, STL, VSWR

Aluminum RF power splitters under test

January 1, 2021March 11, 2016
Two RF power splitters

Two examples of square aluminum RF power splitters built from 1973 plans reveal a 15 MHz difference from the claimed design frequency.

Categories Accessories Tags Aluminum, brass, coaxial, measurement, power splitter, S11, S21, splitter

Help support this site

Become a Patron!
Antenna and repeater parts

Topics & Keywords

2m 6m 10m 15m 20m 40m 43 foot 70cm 80m AHVD APRS Baluns battery BigIR collinear copper Diamond dipole DX-Eng. EFHW Elecraft end-fed EZNEC Field Day Golden Packet hexbeam J-Pole Kenwood kj4faj KX3 kx4o measurement mobile NEC NMO NVIS packet PL259 QRP Simulation SteppIR UHF vertical dipole verticals VHF

Recently popular

  • Build this Vertical Portable HF Antenna
  • The 43 foot vertical – The answer to ...
  • Improving the Super-J
  • Airspy YouLoop LF/MF/HF Möbius Receive Antenna
  • Slim Jim vs. Traditional J-pole Antenna
  • Superbowl HDTV Antenna
  • 40m Mastless NVIS Antenna
  • EFHW LNR Precision EF-10/20/40MKII Examination
  • Small Loop HF Antenna
  • Installing a Vertical Antenna Base with no Concrete
© 2007-2022 John Scott Huggins and other authors and creators, All Rights Reserved.