Wednesday, September 18, 2019

EFHW Antenna --- Building The Transformer. Post 1995.


If you can't see the video, please insert this title URL into your browser search box: https://www.youtube.com/watch?v=sty7RlXQoJI.

Thanks to Steve Ellington for this excellent tutorial on how to design, build, test, and use a 49:1 transformer for End Fed Half Wave Antennas (EFHW).

Although EFHW antennas are fairly simple and inexpensive, they do require a transformer to match the nominal 50 ohm impedance of your HF transceiver to the often high impedance (2500 ohm plus) of half wavelength wire antennas.

In addition to helpful construction details, Steve also shows us how to mount the matching device.  According to Steve, the toroid part number is 5952003801.  You can find these toroids here:  http://www.fair-rite.com/products/toroids.  You can find the enclosure at Lowe's.

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Thanks for joining us today.

Aloha es 73 de Russ (KH6JRM).

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Aloha es 73 de Russ (KH6JRM).