The Johansson 7781 is a multiband split-band distribution amplifier with one cable input covering the 47–862 MHz frequency range. It delivers high output power with separate gain adjustments, making it suitable for distributing antenna signals to multiple outlets throughout a building.

The amplifier is fully LTE-ready and includes a high-input-power design that makes input overload virtually impossible. A detachable power supply is included, and a -30 dB test output allows signal measurement without disconnecting the main distribution.

Key Features

• 1 cable input covering 47–862 MHz
• Split-band design with interstage attenuators and 20 dB dynamic range
• Gain adjustable from 15 to 35 dB
• Maximum output power of 116 dBµV
• -30 dB test output for signal monitoring
• Detachable power supply included
• Compact housing
• Fully LTE-ready with built-in LTE filter

Product Benefits

• Separate gain adjustment allows fine-tuning to compensate for different cable lengths and building layouts
• High maximum input power (100 dBµV) prevents overload even in areas with strong broadcast signals
• LTE readiness blocks interference from 4G/LTE mobile frequencies without additional filters
• The test port lets an installer verify signal levels at any time without disrupting connected outlets
• Detachable power supply simplifies installation and replacement

Technical Specifications

• Inputs: 1 Cable
• Outputs: 1 main + 1 test port (-30 dB)
• Frequency Range: 47–862 MHz
• Gain: 15–35 dB
• Slope: 5–15 dB (at 15 dB gain), 25–35 dB (at 35 dB gain)
• Max. Input Power: 100 dBµV
• Max. Output Power: 116 dBµV
• Noise Figure: 7 dB
• Return Loss: >10 dB
• Test Port: -30 dB
• Supply Voltage: 100–240 VAC
• Power Consumption: 8 W

Why You'll Love It

• Universal 100–240 VAC supply works across all European and international mains voltages
• Compact housing makes it straightforward to install in a head-end cabinet or equipment rack
• Includes a power adapter cord and instruction manual for a complete installation out of the box
• Far more efficient than its predecessor, reducing running costs in long-term installations