50Ohm Dummy Load DIY Kit
The 50Ohm.de Dummy Load is more than just a handy accessory – it is an ideal soldering project for newly licensed radio amateurs, training stations and portable operation. Developed by DL1FLO (Florian Schmid) and DL9MJ (Matthias Jung) in cooperation with the AJW department (training, youth and further education) of the DARC and blinkyparts, this open-source kit combines a useful tool with a hands-on learning experience.
What is a dummy load?
A dummy load lets you test a transmitter safely without radiating RF power – the transmit power is converted into heat instead. Ideal for alignment, power checks and training purposes.
Why this dummy load?
- Compact sandwich design with low inductance
- Perfect for QRP operation (please do not use with high transmit power)
- Convenient BNC connector
- Built-in measuring circuit (diode + capacitor)
- Two identical circuit boards for easy assembly
- 50ohm.de as the accompanying training platform
- Carefully packed in Germany
What's in the kit
- 2x circuit boards (identical)
- 20x 1 kΩ resistors (3 W, 5 %)
- 1x BNC socket (50 ohms)
- 1x 10 nF capacitor
- 1x Schottky diode (BAT41)
Difficulty: 3 out of 5 · Assembly time: 40–60 minutes
Additionally required: soldering iron, solder and side cutters (not included)
Ideal for
- Young and newly licensed radio amateurs
- Training stations and courses
- Outdoor and portable QRP operation
- Soldering beginners (thanks to the detailed instructions)
| Product weight: | 0,60 Kg |
Safety Information
- WARNING: Not suitable for children under 14 years.
- Choking hazard due to small parts that may be swallowed.
- We recommend: supervision of the assembly and soldering process by an adult.
- Keep these assembly instructions in a safe place for later use! They contain important information.
- When soldering, the soldering iron, the solder and the components being soldered become very hot.
- ALWAYS wear safety glasses when soldering and assembling the kit.
- Always use a fireproof surface when soldering! A silicone mat prevents the components from slipping.
- To keep the soldering iron safe during assembly, always use a suitable soldering iron stand.
- The kit is intended for use with suitable radio equipment only.
- Never leave small children alone with the kit!
- WARNING: Never connect the kit to mains voltage! There is an absolute danger to life!
- At the end of its service life, please take the device to a certified disposal company. This is good for the environment and ensures correct disposal.
- Subject to changes and errors.