Description
- 40 meter Cage dipole antenna
- Ni4L Dipole Antenna
- #14 Copper hard drawn wire
- Ansulator Unadilla
40 meter cage dipole Each cage dipole is hand made with quality and care, using materials that will take the abuse of even the most harsh enviroment. The wire used is #14 AWG 7 STRAND Copper Hard Drawn with .030 High Density PE Black Jacket. Nominal OD .133. Making this an excellent choice for antenna wire! Will not stretch over time as would a wire that is not hard drawn. The center connector used is the W2DU ANsulator, W2DU End-sulators. The balun used is the Choke-Kit, Specifications Frequency: 1.8 - 60 MHz Through-line impedance: 50 ohms (nominal) Insertion loss: less than 0.2 dB at 60 MHz Common mode inductance: 24 uH (nominal) Power handling: 2kW continuous duty Load mismatch tolerance: greater than 5:1 VSWR at 2kw Connectors: PL-259 and SO-239 Ferrite material: seven Fair-Rite P/N 2643102002 (850 Initial Perm, 2900 gauss at 10 oersteds, nickel-zinc) Specifications subject to change without notice 24 microhenries provides an inductive impedance of 270 ohms at a frequency of 1.8 MHz. (multiply Inductance in microhenries by Frequency in megahertz by 6.28 to get Inductive Impedance in ohms) *For a full explanation on how a balun works, see Chapter 9 of Transmission Line Transformers" by Jerry Sevick, ISBN 1-884932-18-5 The cage material is 7" round X 1/4" thick white ABS plastic. The cage dipole is a 1/2 wave in size aprox. 66' in length. Each side has 6 wires, held together with galvinized cable clamps, crimped with a copper sleeve and soldered, then covered with adhesive lined heat shrink. The 40 meter cage dipole has a bandwidth spread of almost 1 mhz. 3:1 and under. The 40 meter cage dipole can be installed flat or inverted V, recommended height 25'.