$70 End Fed Half Wave Antenna Kit for 10/15/20/40 Meters

ARRL Kit Purchase Link

ARRL has partnered with HF Kits to bring you this easy-to-build 4-band antenna kit: an end-fed half-wave (EFHW) antenna. We built it in the ARRL Lab, set it up outside, trimmed the wire for the lowest SWR, and got it on the air. Now it’s your turn!

The advantage of an EFHW is the ease of construction, it’s versatility in a variety of installation configurations (sloping, horizontal, L, etc.), no tuner is needed, and this one works on 4 bands: 10, 15, 20, and 40 meters. We chose a 250-watt rated antenna so you can comfortably transmit the full output power from many off-the-shelf HF transceivers (typically around 100 watts).

Building the kit is easy. You’ll drill, fasten, and solder (a small amount). Most everything goes into the included weather-proof box. Admire, then deploy!

Who needs this antenna?

  • New licensees. Build something, and you’re no longer a licensee…you’re a ham!
  • New HF operators…and anyone seeking an antenna that covers the bands that will become increasingly active with Solar Cycle 25.
  • Every Field Day site
  • Experts…because you’ll appreciate a quality kit, and you’ll end up with a great antenna you can take with you anywhere (think vacation).
  • Radio clubs seeking a perfect kit for your next project building night!


  • Bands: 10/15/20/40
  • Power rating: 250 W PEP
  • Impedance network type: 49:1 with included ferrite toroid
  • Wire antenna length: includes 66 feet (approx. length) of strong, flexible, and low weight wire
  • Coaxial cable feedline sold separately
  • Required assembly tools (you supply): drill and drill bits, pliers, wire cutter, sharp knife or sandpaper, soldering iron and solder, screwdriver, marker
  • Assembly instructions: arrl.org/end-fed-half-wave-antenna-kit

Parts (included)

Impedance network

  • P65 enclosure 100 x 100 x 55 mm with weather sealant and screws 4x
  • Toroid Amidon FT240-43
  • Toroid mounting plate
  • Stainless steel M3 6mm screws 4x
  • Stainless steel M3 split lock washer 4x
  • Winding wire 1.0 mm
  • Cable ties 8x
  • 100 pF capacitor 2kV
  • SO-239 chassis mount connector
  • Stainless steel M3 bolt 12mm 4x
  • Stainless steel M3 nut 4x
  • Stainless steel M3 washer 4x
  • Stainless steel M3 tooth washer 4x
  • M3 cable lug
  • M5 cable lugs 2x
  • Stainless steel (A4) M6 strain relief
  • Stainless steel M6 nut
  • Stainless steel M6 washer
  • Stainless steel M6 lock washer
  • Stainless steel M5 bolt 25mm 2x
  • Stainless steel M5 wing nut 2x
  • Stainless steel M5 nut 4x
  • Stainless steel M5 washer 4x
  • Stainless steel M5 tooth lock washer 4x
  • Stainless steel M5 split lock washer 4x


  • 66 feet (approx. length) of strong, flexible, and low weight wire
  • 2x Stainless steel cable clamp
  • 1x end insulator
  • 1x cable lug 5mm
  • 1x Heat shrink sleeve for cable lug

ARRL: The OHIO Section is sponsoring learning and exploring sessions

ARRL Ohio Section Logo

New To Ham Radio?

The OHIO Section is sponsoring learning and exploring sessions.

Technical Specialist Jason – N8EI will be presenting one of those sessions TODAY, August 31st beginning at 7:30pm. His topic is “Beyond the Baofeng: Thoughts on Equipment Choices for New Hams.” You received your license. Picked up a $20 Baofeng. Tried to reach some repeaters with it. Now what?

The OHIO Section is inviting you to this scheduled Zoom meeting. If you are a new ham, know a new ham, or just have an insatiable interest in Ham Radio – Join us TONIGHT!

Topic: Ohio Section – “Beyond the Baofeng: Thoughts on Equipment Choices for New Hams.”
Time: Aug 31, 2021 07:00 PM Eastern Time (US and Canada)

Join Zoom Meeting

Meeting ID: 899 1305 7151
Passcode: 241591

Copyright © 2021 ARRL Ohio Section, All rights reserved.
You are receiving this email because you opted in via our website.

Our mailing address is:
ARRL Ohio Section
1480 Lake Martin Drive
Kent, OH 44240-6260


ARRL Now Provides FREE RF Exposure Calculator

The FCC has adopted guidelines and procedures for evaluating environmental effects of RF emissions. The new guidelines incorporate two tiers of exposure limits based on whether exposure occurs in an occupational or “controlled” situation, or whether the general population is exposed or exposure is in an “uncontrolled” situation.

Under the new FCC rules, some amateurs need to perform routine station evaluations to ensure that their stations comply with the RF exposure rules. This can be as simple as running an online calculator to determine the minimum safe distance between any part of your antenna and areas where people might be exposed to RF energy from your station. Although amateurs can make measurements of their stations, evaluations can also be done by calculation.

To make this easy for amateurs, ARRL now provides an RF exposure calculator on its RF Exposure page. To use the calculator, enter your transmit peak-envelope power (PEP) and operating mode, and answer the questions about the maximum amount of time you might be transmitting. The calculator will give you the minimum distance people must be from your antenna and human exposure.

You can print the results and keep them in your station records. There is no requirement to send your results to the FCC.