|
Amateur radio antennas New! OPEK 80m-70cm mobile multi-tapped whip...A$129 Factory-direct Hustler antenna importer (from 01-10-08) |
|
| Type | Price $(AUD) |
| AOR DA-3000 discone antenna, 75-3,000MHz, 10m of RG-58 w/N plug | $249.00 |
| Cushcraft R8 40-30-20-17-15-12-10-6m vertical, 8.7m tall | $999.00 |
| Hustler 4BTV 40-20-15-10m vertical, 6.5m tall | $399.00 |
| Hustler 5BTV 80-40-20-15-10m vertical, 7.5m tall | $499.00 |
| Hustler 6BTV 80-40-20-15-10m + 30m vertical, 7m tall | $599.00 |
| Hy-Gain 18AVQ Mk.II 80-40-20-15-10m vertical | $499.00 |
| Hy-Gain DX-88 8-band 80-40-30-20-17-15-12-10m vertical, 8m tall | $899.00 |
| Hy-Gain GRK-88, ground plane radial kit for DX-88 antenna | $149.00 |
| Hy-Gain antennas - available on order | P.O.A. |
| OPEK HVT-400 80m-70cm tapped mobile whip, 1.75m, 120W rated | $129.00 |
| USA 2" diameter 3/8" ball-mount antenna base to suit AST6BTV below | $59.00 |
| Van Gorden G5RV HF 3.5-30MHz broadband wire dipole (not 10MHz) | $199.00 |
| Radio Wavz G5RV 80m-10m broadband dipole with SO-239 termination | $179.00 |
| NEW! Astatic AST6BTV Stainless steel section 6-band 80m to 6m mobile whip (upgrade of the world famous Valor AB5T) allows 20m to 6m operation plus 40m -or- 80m. That's 5 bands all at the same time! | Only $299.00 Top value! |
| Some recommendations re installing HF multiband vertical
antennas... 1. If you have access to a flat, or slightly pitched, metal roof then you should mount your HF vertical on top of a 2-3m long metal pole placed in the centre of that roof. The larger the surface area of the shed's roof, then the higher the vertical should be above that roof because of the increased radio wave reflection by the roof's metal surface area. The guying radials don't need to be metal and, in fact, there is no need for them to be metal in this instance. Polyester rope of, say 6mm diameter, is recommended for guying. If mounting the HF vertical on a full metal shed then you should ground the shed in at least two diagonally opposing corners. 2. If you want to reduce your vertical's ground losses and not increase its angle of radiation you should mount your vertical on top of a 3m-4m long metal pole - not at or near ground level! Next, run 4 or more wire radials (these can also be used as guy wires) from just under the HF vertical down to ground level at an angle of between 20 to 50 degree angle (from the ground up). An angle of 45 degrees is best, for several reasons. Now, place a circle of wire at ground level with your vertical's mounting pole at the centre of this circle. Next, securely attach the ends of each wire radial along this circle, thereby forming a skeletal conical shaped ground plane. This arrangement negates the labour-intensive need to install one or more 1/4 wavelength (+5%, less K factor) long ground plane radials per band, whilst still providing a good ground plane effect. |
|