Sandford Wattmeter

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The Sandford Wattmeter   – Consists of the following three instruments:

• Dual range (5 & 20 watt Full Scale) Power Meter
• 50Ω* Non –Inductive Load (Dummy Antenna)
• 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.