Sandford Termination Wattmeter

Please be aware that this is a 'proper' kit, all the drilling and holes have already been punched for you but you need to do some mechanical assembly as well as soldeing to produce the finished item.  Please read the build instructions before you purchase.

Build Instructions 

The Sandford Termination Wattmeter   consists of the following three instruments:

A dual range (5 & 20 watt Full Scale) Power Meter

A 50Ω* Non –Inductive Load (Dummy Antenna)

A Resistor pi network giving a -34dB sample output

The wattmeter is intended for use as a piece of test equipment in the QRP

enthusiast’s shack. The accuracy is better than 10% which compares favourably with commercial units intended for the amateur market.

The kit when constructed as per these instructions will dissipate 5 watts indefinitely and up to 20 watts for short periods.