440 MHz repeater rack. This repeater is much easier to understand than the 2m repeater system.

Repeater and power supply.

HP Vectra PC monitor and keyboard.

HP Vectra PC. This PC runs a Linux operating system and controls the 440 MHz repeater.

The back of the 440 MHz repeater rack, showing the diplexer (deep notch filter at the TX frequency) that allows 440 MHz RX and TX on the same antenna.

Building 3W, Northwest roof, and our 440 MHz antenna (the tall one on the left). The shorter antenna to its right is a Global Positioning System antenna.