The MFJ-836H is an all-in-one RF Ammeter/SWR/Wattmeter! You can quickly determine feedpoint impedance and monitor antenna system for detrimental changes under power.

Read RF current in three calibrated ranges -- 3, 10, 30 Amperes. A large 3-inch lighted easy-to-read Cross-Needle meter lets you read SWR, forward (300/3000W) and reflected power (60/600W) simultaneously.

MFJs exclusive TrueActiveTM circuit gives you true peak or average power readings. SO-239 connectors. Use 9 Volt battery and/or 12Vdc or 110Vac with MFJ-1312D. 6"W x 3-1/2"H x 4-1/2"D