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Right!
the big improvement in broadbanding seems to be going from 1 to 2-3 wires. Rather, from 1 to a lot of wires OR to 2 or 3 THICK self supporting masts. More wires, smoother passband. Less wires, more mismatches. I have checked a couple of things: 1) Land based cage monopoles. Typically: - height: .24 lambda at the lowest frequency - max diameter: .18 lambda at almost half height - up to 24 / 36 wires - ground plane with at least 24 wires - bandwidth easily 7:1 2) Pix of dipoles spotted atop Russian embassies, eyeballed based on height of balcony railings - 6 conductors - spacers approx. 1 m diameter, every 3 m - poles typically 10-12 m each If you No free lunches at the Maxwell Cafe. Whence the success of the Maxwell House brand. http://www.eznec.com/ No free lunch there either. The demo only does 20 elements. If I did an 8-wire cage in decent sized diameter stainless steel rope, it would set me back in the 100s at my local prices, so I might as well buy the SW and learn to use it. The copperclad steel MIG continuous welding wire I was testing has rusted in ONE NIGHT under the fall rain. I'll look for a source of stainless welding wire. I have a single wire sloper up for the last 4 years and it looks absolutely new - courtesy of the head of mechanical maintenance at a cement factory I did consulting at. |
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