This single CDF139/148 dipole was designed to cover the new JRC band frequency and is manufactured to a high degree of Telecommunications specifications. All the dipoles for the CDF series are fabricated from one piece of tube, this has been done to alleviate the possibility of any high resistance points that could become present in a dipole that is made from more than one piece. The internal balun is completely seal moulded in black carbon-loaded polyethylene. These antennas are ideal for wide band applications and can be stacked vertically and fed in phase, using two/four dipoles, a gain of 3dB/6dB respectively can be obtained.

ELECTRICAL & MECHANICAL SPECIFICATIONS

Gain over 1/2 wave dipole  Unity
V.S.W.R. Better than 1.5:1 over the operating band
Maximum input power rating 150 Watts
Input impedance 50 Ohms
Band width +/- 15% of the centre frequency
Polarisation Vertical or Horizontal
Connection 3 metres of RG213 fitted with N-Type socket and PVC sleeve
Support boom 1 1/4" x 12 swg aluminium alloy tube - HE30TF
Radiating elements 3/4" x 16 swg aluminium alloy tube - HE9TF
Castings Kemloc aluminium alloy
Insulator Black carbon polyethylene
Nuts & bolts 18/8 stainless steel and A2 Nyloc nuts
Weight 2.6 kg
Windloading 7.7 kgf (16.3lbf) @ wind velocity of 160 kph

Radio Structures Ltd - Antenna

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Tel: 01604 790005 - e-mail: sales@radiostructures.com