Kalmus KAA4020

The Kalmus KAA4020 is a broadband RF power amplifier delivering 25 W into a 50 Ω load across the 10 kHz to 230 MHz frequency range. Designed for laboratory applications, communications work, and RF immunity testing, it operates without tuning, band switching, or manual adjustments. The amplifier achieves a minimum power gain of 43 dB and accepts drive levels from standard signal generators.

Technical Specifications

Frequency Range: 10 kHz to 230 MHz

Rated Output Power: 25 W into 50 Ω load

Power Gain: Minimum 43 dB

Input Impedance: 50 Ω nominal

Output Impedance: 50 Ω nominal

Class of Operation: Linear Class A

Input Power for Full Output: 1 mW

Key Features

Zero-adjustment operation - no tuning or band switching required

Automatic thermal protection with gate bias interruption at overtemperature

Automatic recovery when temperature normalizes

N-type female connectors

Forced-air cooling

AC power indicator and temperature indicator

Primary power: 100–240 VAC, 50/60 Hz

Typical Applications

General-purpose RF amplification in laboratory settings

Communications systems requiring linear amplification

RF immunity and susceptibility testing

Signal conditioning for test and measurement

Compatibility & Integration The KAA4020 integrates directly with standard RF signal generators and test equipment operating at industry-standard 50 Ω impedance. Its broad frequency range and fixed-gain architecture eliminate the need for reconfiguration across multiple applications.