QRO.cz MK2 Classic 6-to-2 Antenna Switches

QRO.cz MK2 Classic 6-to-2 Antenna Switches are engineered to optimize SO2R (Single Operator Two Radios) setups by offering flexible switching configurations. Operators can use the switch to connect two transceivers to up to six antennas, six transceivers to two antennas, or even configure it as a Band Pass Filter (BPF) switch for two transceivers. The MK2 version introduces several enhancements, including improved isolation and a newly integrated Hazard Protection Board for added safety and reliability.

This model also incorporates First-Win logic, which ensures that only the first valid control signal is accepted, preventing conflicts. Control is made versatile with BCD (Binary-Coded Decimal) inputs that feature optocoupler isolation and high-voltage protection. The BCD interface is compatible with TTL logic and supports voltages up to 15VDC. Additionally, BCD signals exceeding 13VDC can directly power the internal relays. For added protection, when DC power is not present, all unused antenna ports are automatically grounded.

Included in Package

Antenna Switch assembled and tested Mounting Bracket

Key Features

• Switching Capability: 6 ports switchable to 2 inputs/outputs

• Performance: High isolation, low insertion loss

• Protection: Hazard board protection for both 2 x 6 and BCD control modes

• Logic Control: First-Win logic to prioritize the first valid control signal

Additional Feature and Specifications:

• Frequency Range: DC to 60MHz

• RF Connectors: UHF female SO-239

• Power Handling:

  • Up to 3kW PEP continuous wave (DC to 30 MHz)

  • Up to 4kW PEP (SWR < 1:1.7)

• Impedance: 50-Ohm characteristic impedance

• High isolation between A and B ports: 100dB (20m), >90dB (10m) - no port selected

• High isolation A-1 and B-2: >100dB (80m), >84dB (20m), >74dB (10m), 64dB (6m)

• High isolation A-4 and B-1: >100dB (80m), >87dB (20m), >77dB (10m), 67dB (6m)

• Insertion Loss: better than 0.04dB (10m), 0.02dB (20m)

• Control Positive DC 2 x 6 wires: + 12 to 15VDC

• Control 2 x BCD: + 3 to 15VDC (TTL compatible or direct 13 to 15VDC BCD), when the BCD voltage is higher than 13VDC, it directly supplies the relay BCD inputs with optocouplers and protections

• BCD Inputs: Wide Range, 3 to 15VDC

• BCD inputs with positive control: compatible with OM-power, Microham. Pull up Resistors for open collector devices.

• High quality RF PCB thickness: 2mm

• High quality connectors

• Aluminum shielded enclosure

• Aluminum mounting holder with bracket: Max 2.0-Inch pipe

• Aluminum Enclosure Size: 8.74 x 5.71 x 2.95in. (222 x 145 x 75mm)