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Radio Antennas / Tower Systems & Duplexers for Remote VHF & UHF Radio Repeaters

Comprod AntennasTimberline Radio Systems Ltd Constructs and Maintains Radio Antennas, Radio Repeaters, Duplexers and Towers across British Columbia, Yukon & Alberta. We're the Western Canada Distributior for Comprod Antennas, Duplexers, Multiplexers and RF Products.

From Repeater Stations to Mobile Radios, the Antenna System is the most critical component of your communications; if it isn't working properly Radio Repeater Squamish British Columbia or not at all, then no matter how much power your transmitter may have, your radio signal is diminished. In many cases, especially with older radio transmitters, poor un-matched or out of phase antennas pose a risk to the final amplifier on the transmitter, causing complete failure.

Timberline Radio Systems Ltd. supplies Comprod Antennas and RF products for all types of Transmission Requirements from Two Way Land Mobile, Industrial, Marine, Cellular and Microwave. Directional and omni-directional systems and Engineering to suit your requirements.
Our Repeaters, Antennas, Duplexers and Radio Towers, deliver some of the most reliable performance across Canada including British Columbia, Yukon & Alberta.

Timberline Radio Systems Introduces the Comprod 870 Series Antenna Product Line.
Folded Dipole Antenna from VancouverConsidered the Pioneer of Radio Antennas, Comprod Communications has been manufacturing antennas nearly, since the invention of radio. Their product lines include Folded Dipoles, Verticals and Cross-Polarity as well as a wide selection of duplexers and multiplexers. Comprod meets and exceeds the worlds finest RF standards.

Our featured product is the Comprod 871F 1/2 wave single lobe antenna better known for it's practical deployment especially in general class and portable applications.

The Comprod series is unique in its high efficiency and exceptionally wide bandwidth, covering the frequency ranges of 118-137 or 138-174 MHz at a VSWR of 1.5:1 or better. As a result of genuine, wide bandwidth design, the Comprod series is perfectly suited for multiplexed and multi-channel systems.

Several model variants of this rugged antenna are available: Pattern adjustable version with external cable harness enabling its pattern to be changed in the field; and the fixed pattern versions (such as the 1/2 and 1/4 wave options), that includes the cable harness inside the mast and dipole booms.

Western Canada Distributor for COMPROD Communications
Timberline Radio Systems Ltd. Richmond, British Columbia
Telephone: +1 604-290-3915

138-174 MHz 
Electrical Specifications  871F-70 872F-70 874F-70
Frequency Range, MHz 138-174 138-174 138-174
Nominal Gain, dBd 2.0-2.5 5.0-5.5 8.0-8.5
Number of Dipoles 1 2 4
Bandwidth: 1.5:1 VSWR, MHz 36 36 36
Polarization Vertical Vertical Vertical
Pattern Offset Offset Offset
Power Rating, Watts 200 450 450
Nominal Impedance, Ohms 50 50 50
Lightning Protection DC Ground DC Ground DC Ground
Standard Termination Type N Male Type N Male Type N Male
Mechanical Specifications      
Length, in (mm) 78 (1981) 126 (3200) 246 (6248)
Width (1/2 Wave Spacing), in (mm) 40 (1016) 40 (1016) 40 (1016)
Weight, lbs (kg) 11.8 (5.4) 24 (10.8) 67 (30)
Rated Wind Velocity: No Ice, mph (km/h) 170 (241) 150 (241) 145 (233)
Rated Wind Velocity: 0.5" (13mm) Ice, mph (km/h) 145 (217) 135 (217) 95 (153)
Lateral Thrust @ 100mph wind, lbs (kg) 45 (20.5) 92 (41.7) 160 (72.6)
Bending Moment @ top clamp: 100mph, lb*ft (kg*m) 18 (2.5) 205 (28.4) 1364 (188.7)
Projected Area, ft² (m²) 1.7 (0.16) 3.5 (0.33) 7 (0.65)
Mounting Information Mast 1.9" (48mm) O.D. Mast 2.4" (61mm) O.D. Mast 2.9" (73mm) O.D.

Order Information Adjustable Heavy Duty Side Mount Top Mount Black Anodized
871-70 871A-70 871F-70HD 871F-70SM 871F-70TM 871F-70HDB
872-70 872A-70 872F-70HD 872F-70SM 872F-70TM 872F-70HDB
874-70 874A-70 874F-70HD 874F-70SM 874F-70TM 874F-70HDB

Telephone BC

(By Appointment Only)
1103-11871 Horseshoe
Richmond, BC V7A 5H5
TEL:  604-290-3915

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