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July 22nd 11, 06:44 PM
posted to rec.radio.amateur.antenna
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Cut length on antenna made from coax cable
On Jul 22, 11:51*am, Jeff Liebermann wrote:
*However, I'm not sure if the driven element cut length is the free space 1/4 wavelenth, as it would be with a metal rod coax antenna, or if I should include the 0.67 velocity factor of the coax dielectric covering the center conductor. Is it 19.2" or 12.9" for the driven element? Use the 0.67 VF on transmission line currents. Use VF = 0.95-0.97 for antenna currents. -- 73, Cecil, w5dxp.com |
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