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