With the MFJ-269C your antennas will be perfectly tuned for maximum efficiency. Connect it to the mains supply RF, set bandwidth and Tuning with the knob-just as a transceiver. Read the SWR and complex impedance. Tuning you'll soon find the resonant frequency. Frequency range: 1.8-170 MHz, 415-470 MHz. external 12V power supply or with internal batteries (10 x AA size)
Click here for more information on this product.