ADX-MI3 Band Coded Filter

ADX MI3 Low Pass Filter Bare PCB

The ADX MI3 Low Pass Filter PCB is designed for use in RF and SDR systems to effectively suppress unwanted harmonic frequencies and improve overall signal purity. Each filter is optimized for a specific frequency band, ensuring clean transmission and reception performance in multi-band radio applications.

The MI3 system uses a 4-code identification system on the PCB, allowing users to easily identify the correct filter for each band. This simplifies installation and reduces the chance of configuration errors during operation.

This is an assembled low pass filter, ready for use. For best performance, the design specifies 0805 capacitors rated at 100V XR7 dielectric, ensuring stability and low loss at RF frequencies. Inductors are constructed using 26AWG enamelled copper wire, wound according to the included winding sheet and instructions.

Each board is tested in the field.

Key Features

• Designed for RF  low-pass filtering 
• Suppresses harmonic frequencies for cleaner signal output
• MI3 4-code filter identification system for easy band selection
• Bare PCB for custom assembly and component selection
• Optimized for 0805 100V XR7 capacitors
• Uses 26AWG enamelled wire for inductors
• Includes instructions and coil winding guide

Applications

• ADX MI3 transmitter and receiver filtering
• HF radio band filtering
• Harmonic suppression in RF systems
• Amateur radio and experimental RF builds
• Custom radio and signal processing projects