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5/8 wave on 6 meters	Reply
by VE4AAZ on September 10, 2008	Mail this to a friend!
I picked up a stainless steel 150 inch complete with HD mount at a flea market. Figure I would operate a 5/8 wave vertical mobile on 6 meters to get a low angle or possibly 1/4 wave on 15 meters. The mount will be attached inside at or slightly below the bed rail of my truck almost at the tailgate. Since I don`t have a roller inductor yet does anyone know at what inductance value range I should be looking out for to get the whip with min. SWR on 50.1 to 50.4 mhz. thanks Bill VE4AAZ

RE: 5/8 wave on 6 meters	Reply
by KB1LKR on September 10, 2008	Mail this to a friend!
Aren't you going to need a huge (for a mobile situation) ground plane under a 5/8 wave 6m radiator to get a low takeoff angle?

RE: 5/8 wave on 6 meters	Reply
by K0BG on September 11, 2008	Mail this to a friend!
Well, the truth is, you're not going to get any significant gain from using one, and the takeoff angle isn't going to be any better than a well-place 1/4 wave. This said, if you're intent on operating 6 meter mobile, and you want a BIG signal, then use a halo. If you have high enough local terrain, you can use a stacked pair. Driven with 100 watts, when the band opens you'll be near the top of the pile. Alan, KØBG www.k0bg.com

RE: 5/8 wave on 6 meters	Reply
by AA4PB on September 11, 2008	Mail this to a friend!
Most 6M SSB stations use horizontal polarization which is why serious 6M mobile station use a halo or horizontal loop. Cross polarization results in about a 20dB loss!

RE: 5/8 wave on 6 meters	Reply
by WB6BYU on September 17, 2008	Mail this to a friend!
To answer the question, the 150" whip would require about 200 ohms of inductive reactance, or something over 0.5 uH. I might start with a 6 turn coil about 1" long and 1" in diameter. Should put you in the ballpark anyway.

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