MFJ-834 RF IN-LINE CURRENT METER, COAX, 1-30MHZ, 3AMP

Quick Overview

RF IN-LINE CURRENT METER, COAX, 1-30MHZ, 3AMP

Excl. Tax: £74.12 Incl. Tax: £88.95
MFJ-834
OR

Details

Connect the MFJ-834 Coax In-Line RF Ammeter between your antenna and tuner/ transmitter/amplifier and measure antenna feedline current in 3 calibrated ranges

Use it for tuning your antenna tuner/ transmitter/amplifier for maximum radiated power, for determining antenna feedpoint impedance, for comparing antennas and tuners, for trouble shooting and for checking for changes

Tuning for maximum feedline current for any given antenna always gives maximum radiated power

Any adjustment - transceiver or amplifier tuning/loading controls, antenna tuner settings, whatever - that increases feedline current improves power transfer and gives you a stronger radiated signal

Radiated power increases rapidly because power increases as the square of the current.

Minimum SWR does not always mean maximum radiated power your tuner or lossy coax may be dissipating power and you may not get peak output power even if your tuner or amplifier is properly tuned

Use the MFJ-834 to determine best antenna tuner settings and to compare various tuners

Calculate your antenna feedpoint impedance by dividing your applied power by the square of the feedpoint current

Your antenna can change when you apply power insulators break down, traps heat up, capacitors leak and your feedpoint impedance may be drastically different from your SWR Analyzer measurements

MFJ RF ammeters are rugged, read accurately over 1-30MHz in three linear ranges (.3, 1, 3 Amps) and barely perturb the antenna

Uses SO-239 connectors. Measures 6" W x 3 ½"H x 4 ½"D

Large 3-inch lighted meter. Use 12 VDC or 110 VAC with MFJ-1312D

Also see the MFJ-834H for high current ranges 3, 10, and 30 Amps

Additional Information

manufacturer MFJ

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