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GP 27

Ground Plane AntennasGP 27

¼ λ Ground-Plane Antenna for the 27 MHz Band or for Frequencies within 27…45 MHz

Description

  • GP 27 is a glass fibre ground-plane antenna of the triple-leg type.
  • The antenna is delivered factory-tuned to 27 MHz – further adjustment is not necessary for this band.
  • Tunable (by cutting) to frequencies within the range: 27…45 MHz.
  • The antenna can be field-tuned following the cutting diagrams below as a guide and fine-tuning using an VSWR-meter.
  • For a small cutting charge the antenna may also be supplied factory-tuned. In this case, please state centre frequency.
  • GP 27 is made of first class materials and will endure rough climates for years – no maintenance required
  • LW-SS-1" mounting bracket and GP Adapor is available as accessories.
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.

Specifications

Electrical
Model GP 27
Frequency Tunable by cutting within : 27 - 45 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 < 1.3:1 @ f. res.
Bandwidth 1.0 MHz @ 27 MHz (VSWR < 1.5)
1.5 MHz @ 45 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 0.062 sq. m / 0.67 sq. ft
Wind Load 78 N (160 km/h)
Height Approx. 4500 mm / 177.17 in.
Weight Approx. 1.7 kg / 3.75 lb.
Mounting 38 mm dia. mast tube (42 mm dia. as option, see note)
Environmental
Operating temperature range -30 °C to +70 °C

Ordering Designations

Model Product No.
GP 27 100000162
GP 27/42 mm 100000163
Accessories
LW-SS-1" 110000394
GP Adaptor 100000679

Cutting Diagrams

Cutting Diagram

Please Note

The GP 27 can be delivered with a GP-head for mounting on 42 mm dia. mast tube (standard is 38 mm) when ordering as option GP 27/42 mm.

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