MFJ MFJ-941E Instruction Manual

M·O·DE MFJ-941 INSTRUCTION ANUAL C.AUTl·ON: Read AU Instructions Before Operating Equipment MFJ ENTERPR SES, INC. P.O.BOX 494, MISSISS,IPPI STATE, MS 397·62, USA COPYRIGHT 1991 IMFJ ENTERPRISES, INC. ...

GENERAL INFORMATION The MFJ- 941E is designed to match virtually any transmitter t o almost any antenna, including dipoles, inverted-vees, verticals, mobile whips , beams, random wires , and other s fed by coax lines, balanced lines, or a single wire. A 4:1 balun is built-in for connection to bal anced lines. An antenna-selector switch provides versatile antenna selection. The MFJ- 941E wi ll handle up to 300 watts of RF output power f r om the transmitter f r om 160 thr ough 10 meters. The MFJ- 941E employs a c ross-needle meter so forward power, ref lected power and SWR may be read simul ...

convenient location at the operating position. NOTE: LOCATE THE TUNER SO THE REAR I S NOT ACCESSI BLE DURING OPERATION. If r andom wir e or balanced line operation is used , the cer amic feed thr ough insul ators wil l have high RF voltages which can cause serious RF burns if touched when t ransmitting. 2. Instal l the MFJ- 941E between the t ransmitter and antenna as shown in the diagr am above . A coax line is connected to the t ransmitter and the S0- 239 coax connector marked TRANSMITTER on the back of the tuner. 3. One or two coax- fed antennas may be connected to the S0- 239 coax conn ...

The INDUCTOR switch on the MFJ- 941E represents minimum inductance at position A and a maximum inductance at position L. Less inductance is needed at higher frequencies than at low frequencies for the same impedance. The TRANSMITTER and ANTENNA controls both represent maximum capacitance at position 10. For optimum operation of the MFJ-948, the transmitter must be tuned to a 50 ohm output impedance at the frequency of operation. Set the ANTENNA SELECTOR switch to DUMMY LOAD for tuning up the transmitter.NOTE: Always tune the transmitter at a low output power. After properly tuning the transmitter, set ANTENN ...

M M FORWARD 10K SOOK .01 FORWARD ~ o- row"~ - °-:iJACK -= I 47pt I " Oluf LAMP 01 -= REFLECTED POWER REFLECTED SOOK :.01 -= ------------ - -- --- --------------------, : I I I Sla 208 pf B C D • ' E ••---l F • " K C • < I J H~ L • 208_ pf 11 IS lb 1 : 4 EALUN MFJ-941 E SCHEMATIC DIAGRAM • EXT. DUMMY LOAD COAX 1 1 WIRE I 1Jumper* I BALANCED LINE *Use jumper with BALANCED LINE GROUND ...

MFJ Enterprlses. Inc. and purchased from an authorized dealer or directly from MFJ Enterprises, Inc. to be free of defects In material and workmanship for a period of 1 2 months from date of purchase provided the follc:rMng terms of this wamwity an satisfied. 1. The purchaser must retain the dated proof-of-purchase (bil of sale, canceled check, credit card or money order receipt, etc.) deacribing the product to establish the va- lidity of warranty claim and must submit the original or a machine-reproduction of such proof-of-purchase to MFJ ...