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impromptu dipole
If you really needed to get a 2m rig on the air and you didn't have an swr
meter, do you think you could get way with creating a simple dipole if it was VERY carefully cut according to the formula, and if you wound your own impromptu balun out of 5-6, 4" diameter turns of the (RG-8)cable right below the dipole? Even if the resonant frequency wasn't exactly in the middle of the 2m band, how much damage to the rig would you be risking? I don't see how it could do any serious damage, even if the swr was somehow slightly in excess of 2, or is it just something that is never, ever done --- not checking the swr first with a meter? According to the antenna books I'm reading, 1/2 wave dipoles (where each radiating element is 1/4 wave) don't need fancy matching transformation stuff, the only issue might be RF coming back through the outer braid and causing the cable to radiate --- thus the 5-turns-on-the-cable balun. |
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