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GP 40

Ground Plane AntennasGP 40

¼ λ Glass fibre Ground-Plane Antenna for the 40 - 70 MHz Range

Description

  • GP 40 is a glass fibre ground-plane antenna of the triple-leg type.
  • The antenna is tunable (by cutting) within: 40…70 MHz.
  • The cutting diagrams below indicate the length of the radiator and the radials corresponding to a specific frequency. It is recommended to use the curves as a guide and fine-tune using an VSWR-meter.
  • The antenna comprises a brass GP-head, one glass fibre radiator and three glass fibre radials.
  • GP 40 is made of first-class materials and will endure "wear and tear" for years – no maintenance required.
  • LW-SS-1" mounting bracket and GP Adaptor is available as accessories.

Specifications

Electrical
Model GP 40
Frequency Tunable by cutting within : 40 - 70 MHz
Antenna Type Ground-plane
Max. Input Power 1000 W
Polarisation Vertical
Pattern Type Omnidirectional
3 dB Beamwidth, H-Plane Omnidirectional
Impedance 50 Ω
Gain 0 dBd (2.2 dBi)
VSWR < 1.2:1 @ f. res.
Bandwidth 1.5 MHz @ 40 MHz (VSWR = 1.5)
3 MHz @ 70 MHz (VSWR = 1.5)
Mechanical
Connection(s) UHF(f) (fitting PL 259)
Materials Elements : Glass fibre
Metal parts : Bright chromed brass
Colour White (RAL 9003) / Bright chrome
Wind Area 0.075 sq. m / 0.81 sq. ft
Wind Load 95 N (160 km/h)
Height Approx. 3200 mm / 125.98 in.
Weight Approx. 1.6 kg / 3.53 lb.
Mounting 38 mm dia. mast tube (42 mm dia. as option, see note)

Diagram and Mounting

Cutting Diagram

Ordering Designations

Model Product No.
GP 40 100000165
GP 40/42 mm 100000167
Accessories
LW-SS-1" 110000394
GP Adaptor 100000679

Please Note

The GP 40 can be delivered with a GP-head for mounting on 42 mm dia. mast tube (standard is 38 mm) when ordering as option GP 40/42 mm.

The radiator is measured from its free end to the bottom of the black insulator, while the radials are measured from their free ends to where they meet the GP-head.

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