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Use with MFJ-7740 (MFJ-7740P is a 12 pack)
improved bandwidth
tough inside and out
Side Lobe atten
-Illuminated Cross-Needle SWR/Wattmeter - lets you read SWR
MFJ-812B, WATTMETER, VHF SWR/WATTMETER, 30, 300 WATTS Features_UHF Use with MFJ-7740 (MFJ-7740P isMFJ VHF SWR Wattmeter covers 144 220 MHz This is the worlds most popular and most affordable VHF SWR Wattmeter. It has a built in Field strength Meter. Reads 144 220 MHz SWR Read forward and reflected power in 2 ranges 30 or 300 Watts. MFJ 812B also reads relative field strength from 1 to 220 MHz. Has binding post for field strength antenna. 2 color meter. Measures a super compact 4. 5 x 2. 25 x 3 inches. Black. Product Manuals Download Product Manual