Survivalism & Self Sufficiency Topics > Amateur Radio How-To's

Expedient HF Antenna

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Alan Georges:
Here's an only slightly confusing chart for picking out random wire lengths, depending on the bands you want to tune:
http://udel.edu/~mm/ham/randomWire/
Yes, I know that makes it not quite so random anymore, but I wanted to stack the odds.  Math: taking the mystery out of life and making it easier since 3000 B.C.

Ran a 136' wire around the yard back around Christmas, tuned up on the 160m PSK31 calling frequency (table: http://www.qsl.net/darn/PSK31.htm), and bagged my first 160m QSO within ten minutes.  Random wires are practical... and fun!

armymars:
  PSK31 is cool. I love copying signals I can't hear , but only see on the water fall. Ghost signals. Hi Casper.  Grin

Greekman:
Carl, where to yuo connect the counterpoise wire?
On the tuner or on the BALUN? (i think the latter)

Carl:

--- Quote from: Greekman on April 29, 2016, 01:36:55 AM ---Carl, where to yuo connect the counterpoise wire?
On the tuner or on the BALUN? (i think the latter)

--- End quote ---

connected to the balun and in one case of an indoor antenna,also one connected to the radio with a counterpoise of 6.5 for 10 meters,17 for others bands to 40 meters,and 34 feet for 80 meters and up . The arrangement of antenna and surrounding soil and structures effect how the antenna reacts...also I prefer LDG EXTERNAL matcher as radio/internal tuners often do not have the range (matching ability) to cover all bands well..though this antenna was used by me on 6 through 40 meters .

Carl:

--- Quote from: Alan Georges on January 09, 2015, 09:04:18 PM ---Here's an only slightly confusing chart for picking out random wire lengths, depending on the bands you want to tune:
http://udel.edu/~mm/ham/randomWire/
Yes, I know that makes it not quite so random anymore, but I wanted to stack the odds.  Math: taking the mystery out of life and making it easier since 3000 B.C.

Ran a 136' wire around the yard back around Christmas, tuned up on the 160m PSK31 calling frequency (table: http://www.qsl.net/darn/PSK31.htm), and bagged my first 160m QSO within ten minutes.  Random wires are practical... and fun!

--- End quote ---

Good chart ALAN, Random is confusing but actually refers to random FREQUENCY which makes them more specific than the "any old piece of wire will work" theory.

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