1/4 wave for 20 meters

Useful information regarding antennas for SDR products.
Joevano
Posts: 5
Joined: Fri Aug 10, 2018 1:44 pm

1/4 wave for 20 meters

Postby Joevano » Mon Aug 27, 2018 2:15 pm

I'm taking my SDR camping for a couple weeks. Thinking that 20 meter band is most active, would I want about a 17' wire for 1/4 wave on that band?
Last edited by Joevano on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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g1hbe
Posts: 350
Joined: Sat Jan 17, 2015 3:28 pm
Location: Cheshire, UK

Re: 1/4 wave for 20 meters

Postby g1hbe » Mon Aug 27, 2018 10:50 pm

Seventeen feet is about right, but remember you'll need an earth/gnd.

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Andy

Joevano
Posts: 5
Joined: Fri Aug 10, 2018 1:44 pm

Re: 1/4 wave for 20 meters

Postby Joevano » Mon Aug 27, 2018 11:39 pm

Would 1/2 wave be better? And, if I string it horzontal I don’t need a ground?
Last edited by Joevano on Thu Jan 01, 1970 12:00 am, edited 0 times in total.
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g1hbe
Posts: 350
Joined: Sat Jan 17, 2015 3:28 pm
Location: Cheshire, UK

Re: 1/4 wave for 20 meters

Postby g1hbe » Tue Aug 28, 2018 7:24 am

Half waves are high impedance feed so you can get away with no ground. If your RX has a Hi-z antenna port it will match quite well.

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Andy


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