Among the most valuable tools in any RF toolbox is the Bird Model 43 Thruline Wattmeter. Take it from a man who has fried endless number of IF transformers, transistors and dummy loads in an inept ...

If there’s one instrument that hams and other radio enthusiasts covet, it’s the venerable Bird 43 Thruline wattmeter. The useful RF tool has barely changed in the nearly 70 years since it was ...

Bird's model 43 and most other wattmeters available today were designed to measure power of constant amplitude, sinusoidal waveforms. Modern wireless communication systems can use a variety of digital ...