Balun QRO 2 kW mk2

Product detailed description

Balun version QRO 2 kW

New version 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 a clamp mount version
- overall precision design

Suitable for symmetrical resonant dipoles, deltaloop and vertical antennas, for transition from transmitting double line to coaxial cable.

Specifications:
- Impedance transformation ratio of 1:1 or 1:4 depending on the selected variant.
- input impedance 50 Ohms
- power load up to 2 kW PEP (SSB 2 kW / CW 1 kW / DIGI 600 W)
- power compensated for use in contests
- large ferrite toroid 2x FT-240
- mechanical design for caliper mounting
- PL input connector (UHF)
- antenna radiators are connected to M4 screws and secured with wing nut
- fasteners are stainless steel
- box dimensions 105x105x75 mm
- the box has IP-65 protection
- the box is equipped with a pressure valve
- weight 0,6 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 water vapour condensation 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 aerial cable to the mk2 balun