The KE5GDB 224.2MHz (pl110.9) repeater likely has the largest coverage area of all 220 repeaters in Texas. The repeater consists of a pair of Motorola CDM1550 radios, a 100 watt Henry amplifier, CX-333 antenna, and a Raspberry Pi running Allstar as a repeater controller. In addition, the Pi drives a Kenwood TM-V71a Remote Base.

• RX: Motorola CDM1550, -123dBm for 12dB SINAD
• TX: Motorola CDM1550, 28w TPO (6w if running through amplifier)
• Henry Amplifier: 6w in, 100w out
• Duplexers: Phelps-Dodge 4-cavity BpBr
• Isolator

The repeater is run through the 220 port of a triplexer. The 2m and 440 ports are recombined with a diplexer and fed to a Kenwood TM-V71a. This setup makes use of all 3 bands on the CX-333, and provides remote base access as far south as Belton and Madison County and as far north as Oklahoma City.

A small array of Dallas DS18B20 temperature sensors provide the temperatures of the transmit radio (heatsink), receive radio (heatsink), amplifier (power transistor case temp), and cabinet ambient. The sensors use parasitic power. All sensors are connected via RJ45s, with ground on pin 4 and data on pin 5. The RJ45s are brought to a punchdown block with pins 4 and 5 wired in parallel.