Unun QRO 3 kW

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

Specifications:
- 1:6 or 1:9 impedance transformation ratio 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 hanging by rope
- PL input connector (UHF)
- 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 0,5 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.

Attach the coaxial cable to the balun so that it does not hang by its own weight on the connector.

Demonstration of attaching the antenna wire to the unun