Procom GP 27 User Manual
Gp 27

GP 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 SWR-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.
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.
ORDERING DESIGNATIONS
TYPE
PRODUCT NO.
GP 27
100000162
GP 27/42 mm
100000163
SPECIFICATIONS
ELECTRICAL
MODEL
GP 27
ANTENNA TYPE
¼ λ triple-leg ground-plane
FREQUENCY
Tunable by cutting within: 27…45 MHz
IMPEDANCE
Nom. 50 Ω
RADIATION
Omnidirectional
POLARIZATION
Vertical
GAIN
2 dBi 0 dBd
BANDWIDTH
1.0 MHz @ 27 MHz (SWR < 1.5)
1.5 MHz @ 45 MHz (SWR < 1.5)
SWR
< 1.3 @ f. res.
MAX. POWER
1 kW
MECHANICAL
TEMP. RANGE
-30° C → +70° C
CONNECTOR
UHF-female (fitting PL-259)
WIND SURFACE
0.062 m²
WIND LOAD
78 N @ 160 km/h
COLOUR
White/bright chrome
MATERIALS
Elements: Glass fibre
Metal parts: Bright chromed brass
TOTAL HEIGHT
Approx. 4.5 m
WEIGHT
Approx. 1.7 kg
MOUNTING
38 mm dia. mast tube
(42 mm dia. as option, see note)
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.