Our range includes three UHF Collinear aerials, including models provide gain for the UHF bands 400 to 500 MHz, the 700 to 1000 MHz bands, and The Wide Band Aerial, designed for operating in the UHF Trunking 400-420 MHz, as well as the C&D bands 450-470 MHz.
Collinear UHF 400-500 & 800-1000MHz Aerials
These two models provide gain for the UHF bands 400 to 500 MHz, and the 700 to 1000 MHz bands.
They are formed from 2.7mm diameter stainless steel wire and finished with a black epoxy coating. They mount onto our Aerial Base (VHFB) with the Adaptor (AW12).
The UHF Collinear Aerial (COLUW) has a broad bandwidth. It is supplied pretuned for the Trunking band 400 – 420 MHz, and is readily tuned to the other bands by trimming the top and bottom element as shown in the tuning guide. This tuning dimension is taken from the end of the coil. If further tuning is required, then insert a reflected power meter in the feed line and trim the top element for minimum reflected power.
The 700 – 900 MHz model (COL8W) provides 6 dB of gain.
Model
Description
Image
COLUW
Collinear 3 dB UHF 400 – 500 MHz Wire Aerial
COL8W
Collinear 6 dB UHF 700 – 1000 MHz Wire Aerial
TUNING GUIDE FOR COLUW AND COL8W AERIALS
Tuning Dimensions for COLUW (mm)
| Frequency (MHz) | Bottom Element | Top Element |
| Trunking 400-420 | 200 | 455 |
| CD Bands 450-470 | 165 | 405 |
| F& PRS Bands 470-500 | 155 | 380 |
Tuning Dimensions for COL8W (mm)
| Frequency (MHz) | Bottom Element | Top Element |
| 825-845 AMPS (025) | 60 | 198 |
| 890-915 GSM (021) | 40 | 155 |
WIDE BAND UHF COLLINEAR AERIAL
This Wide Band Collinear Aerial (COLUWB), is designed for operating in the UHF Trunking 400-420 MHz, as well as the C&D bands 450-470 MHz with gain of 3dB.
Its broad band feature enables operation from the Trunking band to frequencies in the C or D band and yet maintain a low return loss (SWR) in each band.
The pretuned aerial element is the standard black 3dB stainless steel model (COLUW) which mounts onto the VHF base (VHFB) using an AW12 adaptor. The feed line and matching network are an integral part of the broad band circuit. The cable supplied is 5 metres long. Please do not alter the length of the base end of the coaxial cable. All items are supplied as a complete kit-set. An installation guide is included in the following section.
INSTALLATION GUIDE FOR COLUWB AERIALS
Prepare the feed line as follows:
- The end of the feed line to be connected to the aerial base is the shorter section from the heat shrink. Prepare the cable as shown and DO NOT shorten its length as this is part of the matching network.
- Insert the cable up into the mounting block from the bottom. Push the cable firmly into the block until the braid is just below the top. Fan the braid out under the block and screw it to the vehicle or a mounting bracket.
- Fit the rubber gasket and screw on the nylon base tightly, then solder the coax inner to the brass centre. The longer coax tail may be cut to length if required.
Mount the pretuned aerial element onto the base with the adapter (AW12).