The CDF165 centre fed folded dipole radio antenna 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
Covers band 150-175 MHz
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 12g mirror polished aluminium alloy tube - HE30TF 
Radiating elements 3/4" x 16g mirror polished aluminium alloy tube - HE9TF 
Castings Kemloc aluminium alloy 
Insulator Black carbon polyethylene 
Nuts & bolts 18/8 stainless steel and A2 Nyloc nuts 
Weight 2.3 kgs 
Windloading 7.0 kgf (15.4lbf) @ wind velocity of 160 kph

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Radio Structures Ltd - Antenna

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