WiNRADiO WR-ACD-1800 Dual Antenna Combiner

WR-ACD-1800 Dual Antenna Combiner

The WiNRADiO WR-ACD-1800 Dual Antenna Combiner solves the age-old problem of connecting two separate HF and VHF/UHF antennas to a wide-band communications receiver. In addition to this basic functionality, this product can also serve as a DC power injector for active antennas, both for HF and VHF/UHF antenna sections.

Simplicity of installation, low insertion loss, high input isolation and wide-band operation, all make this product eminently suitable for general-purpose wide-band communications and scanning receivers from 9 kHz to 2.5 GHz, with antenna cut-off frequency 30 MHz.

The WiNRADiO WR-ACD-1800 Dual Antenna Combiner is especially suitable for use with WiNRADiO G3 series of general coverage scanning receivers, such as the WR-G305i, WR-G305e, WR-G315i and WR-G315e receivers. It can be also used with any third-party reeceivers.

A typical example of a suitable antenna system would be an HF long-wire or active antenna used in conjunction with a VHF/UHF discone, for example WiNRADiO AX-81S HF Active Antenna plus a WiNRADiO AX-71C Discone.


Wide frequency range
Flat pass band
Low insertion loss
High input isolation
No DC power required for combiner operation
Provision for DC power for active antennas ('Bias-T' function)
Rugged weatherproof construction
Simple installation

WR-ACD-1800 Dual Antenna Combiner Installation

The WiNRADiO WR-ACD-1800 Dual Antenna Combiner is connected between the antennas and receiver using SMA connectors and suitable low-loss coaxial cables.<./

No power supply is required for the combiner operation. To provide DC power to active antennas (for example the WiNRADiO AX-81S Active HF Antenna), we recommend using WiNRADiO SF-41 range of low-noise linear power supplies.


Technical Specifications
HF Input
Insertion loss 0.4 dB @ 20 MHz
Cut off frequency 30 MHz @ 3 dB
Pass band 9 kHz - 30 MHz
Type 5-section Low Pass
Input impedance 50 Ohms
Attenuation >35 dB @ 45 MHz

VHF/UHF input
Insertion loss 0.5 dB @ 60 MHz
Cut off frequency 45 MHz @ 3 dB
Pass band 45 MHz - 1.8 GHz
Type 5-section High Pass
Input impedance 50 Ohms
Attenuation 30 dB @ 30 MHz

Typical isolation between inputs 48 dB
Connectors SMA (in/out), DC jack for power supply

Frequency range 9 kHz - 1.8 GHz
Output impedance 50 Ohms

DC input
Max. input voltage 50 V DC
Max. current 250 mA

Specifications are subject to change without notice due to continuous product development and improvement.

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