MFJ 202B is a noise bridge with a range expander. It's great for determining the value of an unknown impedance. Features include a resistance dial from 0 to 250 ohms and a reactance dial from -150 to +150 pF. The MFJ 202B works with any receiver covering the frequency range you want to measure and connects with a coax cable. It's powered by a 9-volt battery and an on/off switch conserves battery life when not in use. Possible use cases include:

• Finding antenna resonant frequency
• Determining the impedance of an unknown component
• Troubleshooting antenna systems
• Matching antennas to transmitters