The Kalmus 757LC is a broadband RF power amplifier engineered for high-linearity performance across demanding applications including radiated RF immunity testing and EW simulation. Delivering 100 W output with 57 dB nominal gain and rugged RF power MOSFET construction, this amplifier combines excellent 1 dB compression and gain flatness with integrated protection circuitry.
## Technical Specifications
• Frequency Range: 100 kHz to 500 MHz
• Gain: 57 dB nominal
• Output Power: 100 W
• Gain Flatness: ±1.5 dB (leveled); ±3.0 dB (unleveled)
• 1 dB Compression: 70 W minimum
• Harmonic Distortion: −23 dBc maximum at rated power
• Spurious Emissions: −66 dBc maximum
• Connectors: N Female (input and output)
• Primary Power: 187–265 VAC, 1ø, 3 kVA
• Cooling: Forced air
• Dimensions: 23 × 22 × 29 inches
• Weight: 86 kg (190 lb)
## Key Features
• VSWR protection safeguards amplifier and load under high impedance conditions
• Overdrive protection prevents damage from excessive input drive
• Dual-mode gain flatness: leveled (±1.5 dB) and unleveled (±3.0 dB) operation
• Low-distortion design suitable for CW, pulse, and sweep applications
• Status indicators: AC Line, Blanking, ALC, VSWR, Temperature, and Remote Active
• Wide instantaneous bandwidth supports broadband RF requirements
## Typical Applications
• Radiated RF immunity testing (IEC 61000-4-3)
• Electronic warfare simulation and training
• General-purpose RF amplification requiring linear performance
• Pulse and CW signal amplification across 100 kHz to 500 MHz
## Compatibility & Integration
Optional control interfaces include GPIB and RS-232. Rear panel connectors and bench-top case configurations available. Standard N-type connectors enable straightforward integration into test benches and production environments.
