• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Skip to footer
Part15

Part15

License Free, legal, low-power radio broadcasting

  • Home
  • The ALPB
  • Forums
  • Members
  • About Us
  • Contact Us
  • Log In

Carl Blare

Profile picture of Carl Blare

@carl-blare

Active 1 year, 9 months ago
  • Activity
  • Profile
  • Friends 12
  • Blog 474
  • Forums
  • Posts

General Antenna

Posted on September 14, 2011

The title “General Antenna” refers to the fact that I am not right now concerned with 3-meter antennas, but with general antenna performance.

The title “General Antenna” refers to the fact that I am not right now concerned with 3-meter antennas, but with general antenna performance.

Over on the Big Talker thread(part 15 on shortwave) I said that today I changed the dipole antenna and had radically different results. Let me explain a few ongoing confusions.

WHEREAS most antenna books tell us to cut the length of an antenna to specific measurements, i.e., half wavelength, I found something different in a book by Edward M. Noll, W3FQJ, “73 DIPOLE AND LONG WIRE ANTENNAS,” where he writes, “Physical length is shorter than calculated wavelength by about 5%.”

Wow. 5-percent is a lot. Shorter.

AND another discrepancy has been noticed where some writers say the transmission-line should be a multiple of the wavelength, but another writer says the transmission-line should be an odd multiple of the wavelength.

Please close the gap on these seemingly different sets of instruction for calculating antennas. What say you?

Primary Sidebar

Who’s Online

There are no users currently online

Recent Posts

  • Letteralmente Radio diventa “Radio Echo One” AM 1450 KHz
  • AM 1503 KHz
  • March Mystery Month On The Blare Blog
  • Test Blog Post
  • Carl’s Back Room

Footer

Members

Newest | Active | Popular
  • Profile picture of Thelegacy
    Thelegacy
    Active 11 hours, 20 minutes ago
  • Profile picture of Johny C
    Johny C
    Active 18 hours, 26 minutes ago
  • Profile picture of Mark
    Mark
    Active 23 hours, 22 minutes ago
  • Profile picture of Slobodan
    Slobodan
    Active 1 day, 1 hour ago
  • Profile picture of radioyoganetwork
    radioyoganetwork
    Active 3 days, 9 hours ago

Copyright © 2021 · Part15 on Genesis Framework · WordPress · Log in