Posted: 5/9/2009 6:02:06 PM EDT
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I'm going to go take my tech test on the 23rd.I'm pretty sure i'll pass.What I'm interested in is talking on the radio while backwoods camping.
Can you show me a pic or two of your past and/or present "field day" antennas, since field day is coming up?The antenna has to be a crude setup. I'm mostly looking for 6m and 2m. |
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I have some sinple 2m and 440 antennas I can post a pic of. Let me upload them...
ETA––pics 
The top one is for 440mhz and can be scaled up for 2m. I have made several of these over the years for 2m,220 and 440 and they all have worked great for what they are. Made from a so-239 connector and some 14ga solid copper wire with some loop type crimp connectors to attach the ground radials to the so-239 connector. The bottom one is made from 450 ohm ladder line and some 18ga bare stranded copper wire. It is for 2m and will roll up for transport. Plans for these can be found online. Both can be hung in a tree. |
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That antenna is a "1/4 wave ground plane". I built one for a friend for his attic. He's a rail buff and listens to the dispatchers and engineers on 160-161 mhz. I just scaled the 2m version, cutting each of the elements just a bit shorter by a ratio of 146/160.
The vertical is a 1/4 wave and is calculated by 234 / freq in mhz = length in feet. Multiply that by 12 for inches. The downward sloping radials (the "ground plane") are 5% longer, calculated by 234 / freq in mhz x 1.05 = length in feet. Multiply that by 12 for inches. For my friend's antenna I made the 1/4 wave vertical and radials from, appropriately enough, rail stripped from HO scale flex track. 
Here it is on Hamuniverse.com: http://www.hamuniverse.com/2metergp.html And the ladder line antenna: http://www.hamuniverse.com/ke4nu450slimjim.html And here you can find a number of 2m/440 J-poles and Slim Jims, roll up types made from twinlead: http://www.hamuniverse.com/antennas.html Scroll down to Antenna Projects, on the right side. |
 This is my AS-2259 NVIS clone antenna. It'll tune all HF bands and works really well out to about 300-400 miles. Here is a link for plans to build one: http://home.centurytel.net/w9wis/NVIS1.html |
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Here's a link to a 2M/70cm dual band OCF vertical dipole I found whilst searching for antenna designs. This is the one I'm going to try. I'll post a report when I get it done.
2M/70cm Dual band vertical I.C. |
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Here's the direct link to the antenna mentioned above:
http://lekstutis.com/Artie/Ham/Projects/OCFDipole.html |