Sunday, September 18, 2011

40m EFHW for the Tiny Tornado

Keeping with the theme of ultra compact, I made a 40m end fed halfwave coupler based on the suggestion from http://www.nfarl.org/mart/node/34

Forgive the blurriness of the picture, but it's basically just an 11uH inductor in an L network w/ a 50pF trimmer. RCA plug on the left, euro binding post on the right.

Here it is all cased up in a short piece of 1/2 cpvc. Adjustment hole on top, and binding screw to connect the 1/2 wave wire is on the left.
It's raining today, so I haven't had a chance to take it out and throw up a wire to test it, but on my ft817 it indicates no SWR... So it's a start.

73 and good QRPing
Jim - AB9LM


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