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CT 27-ZP4

Short Centre-loaded Mobile Antenna for the 27 MHz CB-Band
Description
  • Short antenna with attractive appearance ideal for mounting on the car roof.
  • High efficiency in spite of low height due to high-Q centre-loading coil and matching unit built into mount.
  • Stainless steel ZP4-mount, with ball-joint and wing screw whip-fastening system.
  • Simple mounting exclusively with access from the outside.
  • Delivered with 4 m cable permanently attached to the mount and terminated with FME-connector.
Specification
Electrical
Model CT 27-ZP4
Frequency 27 MHz CB-band
Antenna Type Centre-loaded mobile antenna
Max. Input Power 200 W
Polarisation Vertical
Impedance 50 Ω
VSWR ≤ 1.3:1 @ f.res.
Bandwidth ≥ 350 kHz @ VSWR ≤ 1.5
Mechanical
Materials Whip : Stainless steel, Nylon, Chromed brass
Mount : Chromed brass
Weather- and shockproof plastics
Stainless steel
Cable 4 m RG 58
Installation Torque 7.5 ±1 Nm
Colour Black / Metallic Silver
Historic Brand Amphenol Procom
Antenna Mount Type Hole Mount
Height Approx. 680 mm / 26.77 in.
Weight Approx. 0.49 kg / 1.08 lb.
Mounting 21mm dia. hole (For roof thicknesses 2 mm up to 7.5 mm mounting hole should be 22mm dia.)
Mounting Plate Thickness Max. 2.0 mm (Models up to 7.5 mm on request)
Ordering Codes
Model Product No.
Short Centre-loaded Mobile Antenna for the 27 MHz CB-Band 130000591
Additional Information
Installation

This antenna is supplied with type ZP4-mount. The whip is fastened to the mount by means of our standard ball-joint and wing screw system. The adjustable ball-joint ensures that the whip can always be mounted in a vertical position independent of the angle of the installation spot.

The ZP4-mount is particularly well suited for mounting on car-roofs because of its ability to be installed exclusively with access from the outside. However, the antenna can be installed anywhere on the car, as the ZP4-mount is equally well suited for mounting on e.g. trunk or wing.

1. Installation Dimension

2. Installation Steps

Do not use sealer on rubber gasket or other places.

3. Tuning

The antenna should always be post-adjusted using an VSWR-meter, especially if mounted near metal parts parallel to the whip. Loosen the union nut at the top of the coil and pull out the whip approx. 5 mm at a time until best possible VSWR is obtained. Fasten the union nut thoroughly.

Please Note

To make this antenna operate as efficiently as possible, a matching unit has been built into the antenna mount. Consequently, neither mount nor whip can be used together with other mounts/whips.

PROCOM A/S reserves the right to amend specifications without prior notice
PROCOM A/S • Smedetoften 12 DK 3600 Frederikssund • Denmark
Generated : 2026-06-24 Version 1