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#27
January 11th 06, 12:23 AM
posted to rec.radio.amateur.antenna,sci.electronics.basics
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Dipoles and the rig's RF ground...
wrote:
If you want the vurry best 80m dipole, feed it with nuttin but coax. Well, as a data point, Owen's transmission line loss calculator says there's 0.362 dB loss in 100 ft. of RG-213 feeding a 50 ohm antenna on 75m. The loss using 100 ft. of open-wire feedline feeding a 50 ohm antenna on 75m is 0.169 dB, less than half the loss in the coax. Even the Wireman #554 "450" ohm line is better than the coax at 0.269 dB. Where are the losses in a Ladder- Line fed system? -- 73, Cecil http://www.qsl.net/w5dxp |
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