Unun QRO 3 kW mk2

Product detailed description

Unun QRO 3 kW

New design 2025

- more massive boxes, thicker walls
- brass bushings for lid screws
- Uniform box design for all models
- new power limits
- wider choice of mechanical designs
- choice of pressure valve design
- choice of Amphenol N connector
- MINI version also available in caliper mount version
- overall precision design

Suitable for Windom (1:6) or LW (1:9) antennas

Technical data:
- impedance transformation ratio 1:6 or 1:9 depending on the selected variant
- input impedance 50 Ohms
- power load up to 3 kW PEP (SSB 3 kW / CW 1.5 kW / DIGI 1 kW)
- power compensated for use in contests
- large ferrite toroid 3x FT-240
- mechanical design for caliper mounting
- PL (UHF) input connector
- antenna radiators are connected to M4 screws and secured with wing nut
- fasteners are stainless steel
- box dimensions 105x105x90 mm
- the box has IP-65 protection
- the box is equipped with a pressure valve
- weight 0,7 kg

The box is equipped with a pressure valve.
The function of the pressure valve - if the instrument box is exposed to temperature changes - e.g. the difference between day and night temperatures or if heat is generated in the box during operation and the box cools down after operation - pressure changes and condensation of water vapour occur in the sealed box.
In some cases, a vacuum may even be created, which can cause dust and moisture to enter.
Installing a pressure equalizing valve is a very simple way to provide ventilation while preventing vapor condensation and dust from entering the enclosure.

Example of attaching the antenna wire cable to the unun mk2