What is it?

The 4 channel low pass filter was designed to be used after a PA Linear Amplifier to suppress the harmonics. The key features include a sequential switch which toggles/hops from one filter to another in order to toggle the correct filter for the band.

The Board requires a 12volt supply to power the board and switch the relays accordingly. An optional connector is also included in case the board needs to be connected via a microprocessor or switching circuit.

Why did you make it?

The board was made to interface with the H.F Linear Amp, and after building the filters can be used without any calibration.

What makes it special?

Easy to connect

Switches four low pass filter and is user configurable. 20M - 30M - 17M - 10M

Push Button control to hop the bands

Requires 12v input to power the board

Led indication

BNC Sockets for input and output

What is Included ? Bare PCB with Instructions