Measures Relative Field Strength with your wattmeter.
Replaces the discontinued Bird 4030
Use your Bird Model 43 as a powerful relative field strength meter for sniffing out transmitters, antenna tuning, etc.
1 to 1000 MHz. Compatible with 30uA meter instruments - Models 43, CDI 81000A, etc.
Rubber BNC antenna included.
No active components, no batteries required.