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Standing morphing to travelling waves. was r.r.a.a WARNING!!!
"Cecil Moore" wrote in message et... I have learned from my burned up Hustler coil mystery all the way to "no power in standing waves" and where all those electrons, photons and other antenna creaters go when I feed them power. There's plenty of energy in those standing waves, Yuri, existing as "reactive power" as defined by the IEEE Dictionary (units of VARS from power engineering). When any energy is extracted from a standing wave and used to heat the Hustler coil, it automatically becomes a traveling wave with the voltage and current in phase, not a standing wave with the voltage and current 90 degrees out of phase. Your Hustler coil was burned up by traveling waves, not standing waves. -- 73, Cecil http://www.w5dxp.com Love those absolute statements, just like my mother in-law used to say: "because..." So can we take it apart? I have a quarter wave resonant, fine tuned, coil loaded Hustler mobile 80m whippy. So far we knew that it is a standing wave circuit. Now Cecil tells me that it automatically becomes traveling wave in/through the coil? Wasaaap? Christmas miracle? We know, saw burning and measured that current decreases towards the top as proportional to the standing wave (current). We know that traveling wave has uniform current along the conductor (coil). That it needs to be terminated in characteristic impedance load somewhere in order to have nice smooth constant current distribution along the conductor (antenna). So far I have learned that, yes, standing wave current can burn the coil (now it is traveling), that sw voltage can burn lossy insulator and create corona. That current through resistance generates heat, consumes real power. That resonant antenna is a standing wave circuit, but standing wave voltage and current, while they are measurable and observable do not have (sw) power. When I pump more power to the antenna, it burns faster. It takes power to burn things, but there is no power, just current and voltage. Normally power is voltage times current, but not in Hustler country. (Use lossless transmission line, dummy :-) "You are right Yuri (finally) because......." So what happened to collapsing E field creating M field and them 90 degrees? How can I proceed to explore standing wave antennas vs. traveling waves if I am stuck here on the Hustler whip and its whims and "no power" burning coils? Must be the messed up equilibrium somewhere :-) Huh? Yuri |
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