LDG RU-9:1 Unun 200W HF 9:1 transformer – Radioworld UK
LDG RU-9:1 Unun 200W HF 9:1 transformer – Radioworld UK
LDG 9:1 Unun for vertical and end-fed antennas 1.8–30 MHz – Radioworld UK
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LDG RU-9:1 Unun 200W HF 9:1 transformer – Radioworld UK
LDG 9:1 Unun for vertical and end-fed antennas 1.8–30 MHz – Radioworld UK

LDG Electronics Tuners – Automatic Antenna Tuning Solutions.

LDG RU-9:1 Unun 200W HF 9:1 Transformer

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£34.99
(£29.16 exc. VAT)
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Product code: RU-91
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Item CostFinance OptionDepositMonthly PaymentsTotal Cost
£34.99
12 Months 14.9% APR
£3.50
£3.02
£39.68
£34.99
18 Months 14.9% APR
£3.50
£2.01
£39.68
£34.99
24 Months 14.9% APR
£3.50
£1.51
£39.68
£34.99
36 Months 14.9% APR
£3.50
£1.01
£39.68
£34.99
48 Months 14.9% APR
£3.50
£0.75
£39.68
£34.99
12 Months 19.5% APR
£3.50
£3.14
£41.13
£34.99
18 Months 19.5% APR
£3.50
£2.09
£41.13
£34.99
24 Months 19.5% APR
£3.50
£1.57
£41.13
£34.99
36 Months 19.5% APR
£3.50
£1.05
£41.13
£34.99
48 Months 19.5% APR
£3.50
£0.78
£41.13

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LDG RU-9:1 Unun 200W HF 9:1 transformer – Radioworld UK

LDG RU-9:1 Unun 200W HF 9:1 Transformer


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The LDG RU-9:1 Unun is a compact and versatile 9:1 impedance transformer designed for connecting vertical and end-fed antennas to LDG Automatic Antenna Tuners. Rated at 200 watts PEP, it can also operate independently without an LDG tuner when used with resonant vertical antennas. Covering a wide frequency range from 1.8 to 30 MHz, the RU-9:1 Unun is suitable for a variety of HF antenna projects.

Despite its capability, the RU-9:1 Unun remains lightweight and portable, weighing only 6 oz including its enclosure. Its compact size of 5 x 2.5 x 1.25 inches makes it easy to weatherproof for outdoor installations. This combination of performance, durability and portability makes the RU-9:1 a practical solution for both fixed and portable HF antenna systems.

Whether used with LDG tuners or as a standalone matching device for resonant verticals, the RU-9:1 Unun provides efficient impedance transformation and broad compatibility across HF bands. Its rugged enclosure and simple design ensure long-term reliability in a wide range of operating environments.

Technical Specifications

ModelLDG RU-9:1 Unun
Type9:1 Unun (Impedance Transformer)
Power RatingUp to 200 watts PEP
Frequency Range1.8 to 30 MHz
Weight6 oz (with enclosure)
Enclosure Size5 x 2.5 x 1.25 inches
ApplicationsVerticals, end-fed antennas, LDG tuners, HF antenna projects
WeatherproofingEasy to weatherproof for outdoor use
Use CaseImpedance matching for HF antenna systems

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