måndag 19 april 2010
Måndag kväll nattring
en antenn jag ska bygga 3m element 2 st och bom 2m
The D2T 2-element compact antenna covers 1.5 to 200MHz continuously 1kW PEP. Constructed with 2m boom, 2x 6m elements and weighing 8.5kg. No ATU is needed, and only one feeder of 50 Ohm coax is required. The whole assembly can be rotated by a lightweight rotator. Adapted from a military design (the manufacturer¡¯s main business) the dipole element is directly fed with coax cable via a balun, and the reflector is fed through a phasing section and is terminated with an 820 Ohm resistor.
* 1.5 - 200MHz continuous * 1kW PEP 1.5 - 80MHz * 500W PEP 80 - 200MHz * Input 50 Ohms * VSWR 1.3:1 - 1.9:1 (manufacturers data) * 2 x elements 6m * Turning radius 3.6m * Boom length 2m * Mast 40 - 50mm * Max wind speed 150km/h * Weight 8.5kg
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