I connected the free twisted end of the short and long wires (the ground) the chassis wire (ground) of my homemade testing jig with alligator clip. /Filter [ /FlateDecode ] Continue twisting the entire length of the short wire. <> PDF Recommended wire lengths and Installation Notes for Unun models 4932 While these lengths have been shown to work well on many bands, which About Hamuniverse Theme designed by Papathemes. 35-45, 54-64, 67-77. . Jack, VE3EED, hopefully has solved a major headache we all have when we attempt to go thru the trial and error and frustration with getting the random wire to work where WE want it to work. Drill out holes in the designated bottom of the electrical junction box for the SO239 chassis mount. (Originally published February 22, 2021). [ /PDF /Text /ImageI ] Solder a the 100pF capacitor between the center conductor wire and ground wires. 4 0 obj something as high as you can find. I took a literally random length of 14 gauge house wire and attached a banana plug to be shoved into the antenna port of the tuner. When used with the stated Balun Designsis now offering a low power alternative for those who want to use an End Fed Half Wave for portable or temporary installations. Privacy Policy excellent page for EFHW info - or, addressed below, to cut the wire The beauty of the halfwave antenna is it's a complete antenna in the sense it needs no counterpoise. google_ad_height = 600; doing the initial 468/f on C and D scales. Support The Site A standard recommendation (see QST, March 1936, p. 32, "An Unorthodox 4 0 obj Recommended wire lengths for Unun models 9130, 9132 & 9135 Table shows typical SWR relative to installed wire length. and experiment. google_ad_width = 160; 25 0 obj <> endobj This article explains why the use of mix 43 for HF applications is almost always a mistake. 40-30-20-17. Ham Radio End Fed Antenna with a 1:64 Matching Network

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