1/4 Wave aerials
Our 1/4 Wave Aerials are designed for use on all types of vehicles and installations. They feature a proven design that is extremely rugged in service and yet offer a neat and reliable installation.
Models are available for both the VHF & UHF bands.
The Aerial Bases (VHFB & MVHFB) are injection moulded from high impact nylon which gives UV protection and long service life. The Aerial Whip Adaptor (AW12) is machined from brass with a nickel plated finish, while the high tensile Stainless Steel Whips (WO9) are machine ground to provide flexibility, and are capped with a neat machined tip.
Each 1/4 wave model is also available in a black finish. The whip length provided for the VHF model is 980mm and 200mm for UHF. Unity gain with an omnidirectional pattern are typical features of a 1/4 wave antenna.
Installation instructions and a tuning guide are included at the bottom of this page.
Model
Description
Image
1/4V
1/4VBK
1/4w VHF Bands Complete Aerial, Whip W09 980mm
1/4w VHF Bands Complete Aerial, Black Finish, Whip W09 980mm
1/4U
1/4UBK
1/4w UHF Bands Complete Aerial, Whip 200mm
1/4w UHF Bands Complete Aerial, Black Finish, Whip 200mm
1/4 Wave whips
Four standard whip sizes are available, these cover the range from 70 MHz to 500 MHz. The larger whips (WO9 & W12) are also available with a black powder coated finish.
Model
Description
Image
WUHF
Whip Stainless Steel 200mm
W05
Whip Stainless Steel 500mm
W09
W09BK
Whip Stainless Steel 980mm
Whip Stainless Steel 980mm Black
W12
W12BK
Whip Stainless Steel 1200mm
Whip Stainless Steel 1200mm Black
HELICAL & 1/4 WAVE WHIPS
These aerials are designed for use on hand held transceivers, or applications where a shortened aerial is required. They are available for all VHF & UHF bands and for any customer specified frequency. Full range of RF connectors are available.
The helical radiating element is a high tensile coil assembly, which is plated to improve the radiation efficiency. This element is encased within a silicon rubber tube to provide a very flexible and durable aerial. The 1/4 wave Flexi model is only available for both VHF & UHF. Also wide band 1/4 wave solid core whips are available which screw directly on to the VHFB or MVHFB base.
Model
Description
Image
HHx-CDF
Handheld Helical 450 – 490 MHz C/D/F-Bands
HHx-T
Handheld Helical 400 – 430 MHz T/I-Bands
HFx-T
Handheld Flexi 400 – 430 MHz T/I – Bands
HFx-CDF
Handheld Flexi 450 – 490 MHz C/D/F – Bands
HHx-A
Handheld Helical 80-88 MHz A Band
HHx-E
Handheld Helical BNC 151-156 MHz E Band
HTW-H
Helical on Hi-Tec Whip Base UHF & VHF Fits VHFB & MVHFB
HTW-1/4
1/4 Wave on Hi-Tec Whip Base Broadband UHF & VHF
x Denotes connector type replace with:
- B for BNC plug
- T for TNC plug
- N for N plug
- P for PL259 plug
Aerial bases
The two heavy duty (ground dependent) bases available are the VHFB and the MVHFB. The VHFB is 50mm in diameter and the MVHFB is 38mm in diameter. Both are injection moulded from UV resistant nylon. Both types of bases are supplied with a mounting block and a sealing gasket.
Pre-wired bases are a convenient and fast way to fit out a vehicle. The standard pre-wired base comprises of a MVHFB base which is riveted to a BRMV bracket. A 4 metre RG58 tail is pre-wired to the MVHFB base.
Other bracket and cable length options are available on request.
Model
Description
Image
VHFB
VHF/UHF Aerial Base 50mm
MVHFB
VHF/UHF Aerial Base 38mm
MVHFB
The standard pre-wired base comprises of a MVHFB base which is riveted to a BRMV bracket. A 4 metre RG58 tail is pre-wired to the MVHFB base.
FITTING INSTRUCTIONS AND TUNING GUIDES
We suggest the following method to install the Aerial Base which will firmly clamp the coaxial cable inside the mounting block, and also stops any ingress of moisture.
HFB & MVHFB FITTING INSTRUCTIONS
Prepare the cable as shown.
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.
Fit the block to the vehicle or a bracket.
Fit the rubber gasket.
Screw the nylon base on firmly.
Solder the coax inner to the brass centre with a large hot soldering iron (100 watts plus) and ensure the connection is clean to assist solder flow.
Tuning Guide for 1/4 Wave VHF and UHF Aerials
