MODEL MFJ-484. OWNER'S MANUAL. CAUTION: Read All Instructions Before Operating Equipment. MFJ ENTERPRISES, INC. P. O. BOX 494, MISSISSIPPI STATE, MS. MFJ GRANDMASTER MEMORY KEYER. MODEL MFJ-482B. OWNER'S MANUAL. CAUTION: Read All Instructions Before Operating Equipment. MFJ ENTERPRISES, INC. Review Summary For : MFJ 484B & C GRANDMASTER MEMORY KEYER. Reviews: 1, MSRP: ? Description: The MFJ-484B & C are highly sophisticated memory keyers using CompaniesNew ProductsGift CardsClearanceProduct ManualsNewslettersContact and Support. MFJ-495, MEMORY KEYER/KEYBOARD | MFJ Enterprises Inc. MFJ-826B Digital SWR/Wattmeter Instruction Manual. ALM LED: Illuminates when the SWR is greater than the selectable alarm SWR. Customers using this manual Buy MFJ-482B GRANDMASTER MEMORY KEYER (USED) USED EQUIPMENT online at £75.00 from Ham Radio. In good condition with manual.no box The MFJ-482B Grandmaster Memory Keyer is a sophisticated memory keyer using CMOS To ensure full benefit of this machine, please read the manual.The MFJ-482B Grandmaster Memory Keyer is a sophisticated memory keyer using CMOS Integrated Circuits and Random Access Memory. It has 1024 bits of memory