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ALUNOR RF

VHF 4-Channel Receiver Multicoupler

145-175 MHz, 4 outputs, 0±6 dB gain, OIP3 > +33 dBm, P1dB > +20 dBm, > 20 dB inter-output isolation.

  • Frequency
    145–175 MHz
  • Connector
    N-Female
  • Weight
    2.9 kg
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Specifications

Electrical
Frequency range 145–175 MHz
VSWR (max) 2.5
Impedance 5 Ω
Mechanical
RF connectors N-Female
Weight 2.9 kg
Dimensions (H × W × D) 44 × 482 × 355 mm
Configuration
Channels 4
Gain Db 0 ± 6
Gain Variance Db < 2.5
Oip3 Dbm 33
P1db Dbm 20
Input Vswr 2.5:1
Output Vswr 1.5:1
Output Isolation Db 20
Ac Power 100-127 / 198-264 VAC
Dc Power 12 VDC
Temperature Range -30°C to +60°C
Mounting 19-inch rack
Verified 2026-05-06 · ALUNOR RF Engineering · source: ALUNOR RF Technical Catalogue 2026-01-21

All measurements at 25 °C, 50 Ω, unless otherwise noted.

Why this product

  • 01

    1 antenna feed → 4 receiver outputs without sensitivity loss

  • 02

    OIP3 > +33 dBm — preserves your receiver's linearity budget

  • 03

    AC + DC redundant power — uninterrupted operation through mains glitches

Technical brief

One antenna, four receivers

Low-noise preamp with calibrated gain control distributes a single antenna feed across four receiver inputs without sacrificing sensitivity. Per-output isolation > 20 dB prevents cross-channel desensing. AC + DC redundant power, 1U rack-mount.

Specs that matter for receiver-front-end work

OIP3 > +33 dBm — the multicoupler does not become the IM3 limiter for your downstream receiver. P1dB > +20 dBm — graceful behaviour under strong-signal conditions.

Solves these problems

Primary recommendation

Distributing one antenna feed across multiple receivers without sensitivity loss

A single high-quality receive antenna feeding multiple receivers — without splitting the signal level so far that sensitivity collapses, and without one receiver loading another.

Need a custom configuration?

Talk to an application engineer about variants, custom tuning, or integration into an existing repeater chassis.