TV antennas receive over-the-air network TV signals for FREE from major networks such as ABC, CBS, NBC, Fox, PBS, The CW, MeTV, Univision, and many more, with no subscription or monthly fees. MFJ 993B IntelliTuner™ Automatic Antenna Tuners offer a wealth of features with good power handling at an affordable price.Home > Learning Center > Troubleshooting Reception Troubleshooting TV Reception * Requires 12V DC at less than 1 amp for operation * Optional radio interface for compatible radios * Built-in 4:1 current balun for balanced line antennas * Connector for random wire or single wire antennas
* Two SO-239 unbalanced coax antenna connectors * Bar meters for SWR, forward, and reflected power with range options
* Numeric readings for SWR, forward, and reflected power * Multifunction backlit LCD screen with contrast control * Lighted cross-needle SWR/wattmeter with high, low, and auto range options * Adjustable SWR retune threshold 0.5 to 1.5 change * 1.8 to 30 MHz continuous frequency coverage * Highly efficient switching L-network matching circuit * Four memory banks per antenna with over 2,500 memories per bank * Over 20,000 non-volatile memories for tuner settings * Initially tune in less than 15 seconds, usually less than 5 seconds * Handle 300 watts (match 6 to 1,600 ohms) or 150 watts (match 6 to 3,200 ohms) * Automatically matches antennas with impedance of 6 to 1,600 ohms or 6 to 3,200 ohms (depending on power level)
The next time you operate on that frequency (or close to it), tuner settings are instantly restored and you're ready to operate in milliseconds. When you transmit, they automatically adjust for minimum SWR and remember the frequency and tuner settings, then safely store them in non-volatile memory. The nominal tuning ranges are 0 to 24 microhenrys and 0 to 3,900 picofarads.Īll MFJ IntelliTuners™ learn and remember. With the capacitance switched between the input and output side, this provides a total of 131,072 L/C tuning combinations. A maximum of 256 values of inductance and 256 values of capacitance is available. They are rated at 300 watts to match 6 to 1,600 ohm antennas (SWR up to 32:1) or 150 watts to match wider range of 6 to 3,200 ohm (SWR up to 64:1) antennas. These tuners include a highly efficient switching L-network with wide matching capability, 1.8 to 30 MHz coverage, cross-needle power meters, a backlight LCD screen, a port for an accessory remote control, a radio interface port, and heavy-duty 16 amp/1,000 V relays. Each of the two antenna ports have four banks of memory each memory bank has over 2,500 non-volatile memories for tuner settings. MFJ's exclusive InstantRecall™, IntelliTune™, and AdaptiveSearch™ algorithms provide fast automatic tuning with more than 20,000 non-volatile VirtualAntenna™ memories. They may be operated at a remote distance through a 9-pin to 9-pin computer cable using the MFJ-993RC remote control unit. MFJ 993B tuners are comprehensive automatic antenna tuning centers with an SWR/wattmeter, a built-in antenna switch for two antennas, and a 4:1 current balun for balanced lines. MFJ 993B IntelliTuner™ Automatic Antenna Tuners facilitate tuning any antenna automatically balanced, unbalanced, or single-wire. MFJ 993B IntelliTuner™ Automatic Antenna Tuners
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