The MFJ tuners works automatically, no manual tuning required. The tuning starts with a transmit power as low as 2 Watt (MFJ004BRT, other models require 5W), but 10 to 20 Watt are recommend for best results. The max. power while tuning should not exceed 20 Watt. Although the tuner is equipped with heavy duty 16A/1000V relays, they might be MFJ-945E, TUNER, HF+6M MOBILE, 300W, WITH ANTENNA BYPASS SWITCH MFJ $189.95 MFJ-941E, TUNER, HF, 300 WATTS, WITH MINI CROSS METER MFJ $199.95 MFJ-962D, ANTENNA TUNER, 1.5 kW, 1.8-30 MHz, CN M, SW, BL MFJ $399.95 MFJ-9219, QRP Antenna Tuner, SWR/Wattmeter & Dummy Load MFJ $129.95 MFJ-923, TUNER, 144/440 DUAL BAND, 200W, SWR/WATTMETER MFJ $269.95 The MFJ-941B is designed to match virtually any transmitter to almost any antenna, including dipoles, inverted vees, verticals, mobile whips, beams, random wires, and others fed by coax lines, balanced lines, or a single wire, A 1:4 balun is built in for connection to balanced lines. This unit will handle up to 300 watts of RF output Have an uninterrupted trip as MFJ-945E extends antenna bandwidth and eliminates needs to stop, go outside and read just your mobile whip. Handles 300 Watts. Super Compact Size The small 8W x 2H x 6D inch black aluminum cabinet uses little room. The Cross-Needle meter shows SWR, forward and reflected power -- at a glance. MFJ VERSA TUNER II Model MFJ-945C. Works great have used it for a number of years now no longer doing the Ham Thing. Skip to main content. Shop by category. Shop by category. MFJ HF Manual Radio Communication Tuners, MFJ Radio Antennas, MFJ Ham & Amateur Radio Electronics,