Dual Isolator VHF 145-175 MHz

145-175 MHz, 150 W max power, >75 dB typical isolation, <1.0 dB insertion loss.

Frequency

145-175 MHz
Power

15 W
Isolation

> 75 dB
Insertion loss

< 1 dB
Connector

N(f)
Weight

1.2 kg

Request quote

Specifications

Electrical

Frequency range	145-175 MHz
Max. Input Power	15 W
Insertion loss	<1 dB
Tx-Rx isolation	>75 dB
VSWR (max)	1.5
Impedance	5 Ω

Mechanical

RF connectors	N(f)
Weight	1.2 kg
Dimensions	65 × 114 × 160 mm

Configuration

Power	150 W
Insertion Loss	<1.0 dB
Isolation	>75 dB (Typ @ +25°C)
VSWR	<=1.5:1

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

Dual-stage ferrite, > 75 dB typical at +25 °C
02

VHF tuning for 145-175 MHz
03

150 W continuous, < 1.0 dB IL

Technical brief

VHF variant

VHF counterpart to the Dual Isolator UHF 380-470 MHz. Same dual-stage construction and temperature-isolation curve, retuned for 145-175 MHz.

Solves these problems

Protecting transmitter PA stages from reflected power and inter-system intermod

A failed antenna, a wet feedline connector, or a strong nearby transmitter can drive reflected power back into the PA — and at multi-carrier sites, two transmitters mixing in a non-linear element generate intermod products that fall back into your receiver band.