MFJ-941E
The MFJ-941E gives you a 300 Watt antenna tuner
that covers everything from 1.8 - 30 MHz - plus you get a lighted Cross-Needle
meter with on/off switch, antenna switch and a 4:1 balun! (The light uses 12 VDC
or 110 VAC with adaptor (optional))
MFJ's lighted Cross-Needle meter shows SWR, forward and reflected power all at a
glance in 300/60 and 30/6 watt ranges, 8 position antenna switch lets you select
2 coax lines, random wire/balanced line or dummy load (direct or through).
An efficient 12 position airwound inductor gives lower losses and more power
out. Has 4:1 balun, 1000 Volt capacitors. The beautiful aluminum cabinet has a
durable scratch-proof multicolor Lexan front panel matches your rig perfectly
and fits right into your station.
GENERAL INFORMATION: The MFJ-941E is designed to match virtually any transmitter to any antenna, including dipoles, inverted-vees, verticals, mobile whips, beams, random wires, and others fed by coax lines, balanced lines or a single wire. An eight-position antenna-selector switch provides versatile antenna selection. The MFJ-941E will handle up to 300 Watts of transmitter RF output power. The MFJ-941E employs a cross-needle meter so forward power, reflected power and SWR may be read simultaneously. CROSS-NEEDLE SWR/WATTMETER: The meter on the MFJ-941E may be used alone or with the tuner. Set the ANTENNA SELECTOR to COAX 1 DIRECT or COAX 2 DIRECT to use the meter without the tuner. The MFJ-941E utilizes a cross-needle meter so FORWARD power, REFLECTED power and SWR may be read simultaneously in two ranges. FORWARD power may be read by setting the power range switch to HI (300 Watts) or LO (30 Watts). Next read the power level on the FORWARD SCALE. REFLECTED power is shown simultaneously on the REFLECTED SCALE. SWR is determined by observing the intersection point of the two needles. No SWR sensitivity adjustment is needed to read SWR. The HI range is 300 Watts FORWARD and 60 Watts REFLECTED. The LO range is 30 Watts FORWARD and 6 Watts REFLECTED. The difference between the HI and LO scales readings is a factor of 10. The meter lamp can be powered by a 12 Vdc source, such as the optional MFJ-1312B power supply. Use a 2.1mm coaxial plug with the center conductor of the plug connected to the positive and the sleeve connected to ground. The METER LAMP ON/OFF switch will activate the meter lamp. ANTENNA SELECTOR: The ANTENNA SELECTOR switch utilizes eight positions. They are DUMMY LOAD, BALANCE LINE, COAX 1, and COAX 2 positions for both BYPASS (direct) and TUNED (through) the tuner operation. An external 50 Ohm dummy load can be connected to the EXT LOAD connector located at the rear of the tuner. Do not continuously key into the dummy load for more than 2 minutes at a time.