Bird Electronic Corporation 4301 Wattmeter, Thruline
The Bird 4301 Thruline Wattmeter is a precision instrument designed for measuring forward and reflected RF power in 50-ohm coaxial transmission lines. It operates over a frequency range of 450 kHz to 2.7 GHz and can handle power levels from 100 mW to 10 kW, depending on the plug-in element used. The 4301 features a large, easy-to-read meter and is built for rugged field or laboratory use. Its accuracy is ±5% of full scale, and it is compatible with Bird's full range of plug-in elements, making it versatile for various RF applications. The unit is portable and requires no external power.