GP 27

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

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Electrical
Model	GP 27
Frequency	Tunable by cutting within : 27 – 45 MHz
Antenna Type	Ground-plane
Max. Input Power	1000 W
3 dB Beamwidth, H-Plane	Omnidirectional
Polarisation	Vertical
Pattern Type	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)

Environmental
Operating temperature range	-30 °C to +70 °C

Mechanical
Wind Area	0.062 sq. m / 0.67 sq. ft
Connection(s)	UHF(f) (fitting PL 259)
Materials	Elements : Glass fibre Metal parts : Bright chromed brass
Colour	White (RAL 9003) / Bright chrome
Historic Brand	Amphenol Procom
Height	Approx. 4500 mm / 177.17 in.
Wind Load	78 N (160 km/h)
Weight	Approx. 1.7 kg / 3.75 lb.
Mounting	38 mm dia. mast tube (42 mm dia. as option, see note)

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.

This product doesn’t have any diagrams yet.

Model	Product No.	Model	Add To Quote
GP 27	100000162	GP 27
GP 27/42 mm	100000163	GP 27/42 mm

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Cutting Diagram

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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