EFHW Loading Coil Form
We calculate the final price from your selected file. You review and accept it before payment.
Saved on this device.
A Simple printable form for building a multi banded End Fed Halfwave Antenna
- Rating
- 0 / 5
- Likes
- 5
- Downloads
- 25
- Makes
- 0
- Views
- 132
- Reviews
- 0
Updated at source:
Model information
- Source
- Printables
- Category
- Other Gadgets
- License
- Creative Commons — Attribution — Noncommercial
To build a multi banded End Fed Halfwave (EFHW) antenna, you often need to add a coil to the wire to help. This is because the ham bands are not exact multiples of each other.
One of my friends, Corey N5YCO took advice given on a stream by K6ARK and came up with a method to build an EFHW that works on 40, 30, 20 and 15 meters. With his permission, I have provided the models based on the dimensions he gave me, including a version that has a small flange to make winding the turns a little easier.
To use this, set the coil about 6 feet away from the 49:1 unun and wind 10 turns using 26 AWG wire. See the drawing in the photos for approximate measurements.
Recommended to print in PETG or ASA since it will be outside.