Note
The MFJ-214 Linear Amplifier Saver relieves temperature related stress on amplifiers, tuners, and dummy loads while allowing proper system adjustments. It allows amplifiers to be properly adjusted without the use of long steady carriers.
The unit allows tuning of an amplifier with full required drive from the transceiver without over-heating the finals or anything else in the RF line. It sends a series of pulses to the transceiver allowing the peak power to be high enough to drive the amplifier to full power, but with the average power being low enough not to over-heat the final(s).
The 214 works with any solid state amateur transceiver or transmitter, and all other equipment using positive keying line voltages below 50 volts open circuit and 100 mA closed key current. It can also be used with negative voltage key lines (commonly found in older tube type radios) provided keying voltages are below 25 volts dc open circuit.
The MFJ-214 can also be used as a valuable troubleshooting and diagnostic aid, and can be used in performance tests of QSK systems, wattmeters, and other equipment.
The device uses a single 9-volt battery for power, with battery life dependent on operating and storage time.
