LDG RU-9:1 Unun, 9:1 Impedance Transformer, 1.8–30 MHz, 200W PEP

The LDG RU-9:1 Unun is a 9:1 impedance transformer designed to interface vertical and end-fed antennas with LDG automatic antenna tuners — or to operate standalone with resonant verticals where no tuner is required. By transforming the high impedance of an end-fed or random wire antenna down to a level closer to 50Ω, it allows your tuner to achieve a match far more efficiently than it could without the Unun in line.

Rated at 200W PEP and covering 1.8–30 MHz, it's suitable for HF operation across all amateur bands from 160m through to 10m. The weatherproof-ready construction makes it equally suited to permanent outdoor installations.

Key Features

• Configuration: 9:1 Unun (impedance transformer)
• Frequency coverage: 1.8–30 MHz (160m–10m)
• Power rating: 200W PEP
• Designed for LDG automatic antenna tuners — also operates standalone
• Suitable for vertical and end-fed antenna installations
• Easy to weatherproof for outdoor use

Technical Specifications

• Configuration: 9:1 Unun
• Frequency: 1.8–30 MHz
• Max power: 200W PEP