Designed by Dave Cripe, NMØS
Click for larger image.
Kitted and Offered For Sale By The Four State QRP Group
Sales suspended for vacation
Designed by Dave Cripe, NMØS, the 4S-Dummy Load is a simple kit that employs the use of large SMT parts and some LEDs to provide a dummy load device for up to 10W output. The power-indicator LEDs indicate output power in a cascade method. This kit is useful for showing if your transmitter is making power - or not! It should be a commonly-used test device on the QRP builder's bench.
First time builders please note:
For builders new to surface-mount construction, this is an ideal beginners kit. The extra large 2512-sized SMT parts used in this kit make it easy and a great learning experience as well.
Specifications and Design Features
Frequency range: Works with all Amateur Radio bands
Power requirements: No external power needed
Maximum output power: 10 Watts
Power Indicator LEDs: 0.5w, 1w, 2w, 5w
PCB: High Quality, silk screened printed circuit board.
Assembly Manual, with Schematic, Parts List, and Photos
Parts and Schematic
Electronics 2000's Excellent Capacitor Identification Page Posted with permission.
Electronics 2000's Excellent Resistor Code Graphic Calculator Posted with permission.
The 4S-Dummy Load is carefully kitted and shipped by Dave Cripe, NMØS
Please direct shipping, kit, and part related questions to Dave
All proceeds are applied toward funding OzarkCon.   Thank you for supporting The Four State QRP Group.