User's Manual

1.3 Product Description
ElectroCom's Model HPA4 UHF Amplifier is designed to amplify the RF output of
ElectroCom's DR4B Base Station up to 100 Watts. The HPA4 uses a dual
amplifier design to ensure graceful degradation of output power under fault
conditions and enhanced reliability. The HPA4 features a three-stage thermal
equilibration system, and over-voltage protection prolonging the life of the
amplifier.
1.4 Product Features:
Model HPA4 High Power Amplifier Features:
• Dual Amplifier Design
• 3-Stage Thermal Equilibration
• Over-Voltage Protection
• 12 VDC operation
• Compact size, rugged construction