According to EZNEC, a 1/2 wave dipole up 1/2 wavelength has a gain of 7.76 dbi at 27 degrees elevation. Most of this is due to ground reflection. My vertical has a gain of 0.72 dbi. So I can run 7db more power (500 watts)!!!
73 Roger On 11/12/2015 7:30 AM, Roy Koeppe wrote:
“Kpa500 on 60 is illegal unless you have a *measured and documented* VERY lossy antenna that would reduce the effective radiated power to the same as 100 watts on a dipole. The simple 99 percent answer is that on 60m SHUT OFF the Kpa500 and run 100 watts barefoot.” Let’s see, “antenna tuner” loss + coax loss = -1 dB vertical ant “pattern loss” vs. dipole gain = –2 dB (antenna shorter than quarter wave) “ground loss” under vertical ant (typical) = –2 dB total, –5 dB, or around 250 watts or so from an amp for 100 w erp? 73, Roy K6XK ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
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