Antenna four to one ultimate QRO switch by OK2ZAW
Can be controlled by:
Main functions:
- Four outputs to one input.
Frequency range DC-30 MHz - Characteristic impedance 50 ohm
Power rating DC to 30 MHz 4 kW continue wave 7.5 kW PEP (SWR < 1:1.7) (tested with tsunami) - Designed for OM-power OM-4000++ PA style
- High quality PCB thickness 2 mm
- Two relay version 12V DC, 24 on request
- Connectors PL-259 female with gold plated.
- Power consumption < 3W.
- Disconnect output terminated by 50 ohm or short.
- Aluminium shield enclosure.
- Aluminium mounting holder with bracket (pipe max 52mm). More info
- Stainless screws
- Size 222 x 145 x 75 mm
- Weight 1.4 kg
The measured values
 VSWR |
 Insert loss |
 Isolation 1to4 |
 Isolation 1toOUT |
Easy Controller for this Switch LINK THERE
Download
| Antenna switch | |||||
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| 4 to 1 QRO, version 1 | pcb  |
sch  |
598 | ||
| 4 to 1 QRO, version 5.0 | pcb  |
sch  |
598 | ||
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We believe open source is a better way of doing things. View and download the Shield Schematic and PCB Kicad/Eagle CAD files, LibreCAD .DXF, or Inkscape .SVG files. The hardware designs are released under the Attribution-NonCommercial 2.0 Generic |
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Users implementation photos
 PA3FQA |
 A75GT |
