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On Thu, 14 Feb 2008 06:10:23 -0800 (PST), N0GW
wrote: As for the presentation, that is why I'm here asking the question. No point in putting out info if it is going to be bogus. I saw a discrepancy between my experience and the text books. I'm just trying to resolve that. Hi Gary, Experience is often the most confounding experience you will ever experience. After all, does experience explain the angle at which you receive/transmit that portion of signal in a circuit (the jargon for connection between you and that distant operator)? NVIS can hammer a vertical, if that is what you want; even if you forget to lift the horizontal into the air. So a horizontal dipole on the ground is the best antenna compared to the best vertical? Not when you shift bands and target a DX station. Does experience explain the difference in (at what would be a strain to justify) "a vertical at the same height as a horizontal dipole?" To fill in that last parenthetical: What makes a vertical dipole at an EQUAL height to a horizontal dipole? The equal high feed points? The equal highest point of metal? The equal average height of both? Choose any one of three and the other two could have better performance over the other - and still someone in the audience could cry nothing can be said to be EQUAL. Does the experience at 160M with a ground mounted vertical translate into the same experience at 10M? Experience in the 'burbs with trees, homes, sheds, cars, playsets in the vicinity would suggest no. An antenna 16 times taller can see over those same things which are barely dimples to the field. A head-to-head comparison will quickly resolve; but as this is an amateur society with limited antenna options and a multitude of band choices, experience will often roller-coaster between disappointment and elation - and as so often proven in threads of amazing inventions here, those inventors demand classical text books should be discarded as being obviously counter to "experience." The emerging new invention of an 160M band antenna the size of two shoe-boxes should show how plastic and flexible experience is such that it can stretch to fit into a suit 300 times it size. 73's Richard Clark, KB7QHC |
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