Krohn-Hite 7602

The Krohn-Hite 7602 is a wideband power amplifier delivering precision performance across DC to 1 MHz with output capabilities reaching ±200V peak and 17W RMS into 1 kΩ loads. Built on hybrid CMOS power operational amplifier technology, it combines low distortion (<0.01% to 5 kHz at 175V peak output) with variable gain control spanning 0 dB to 42 dB across three continuously variable ranges. The amplifier accommodates resistive and reactive loads while functioning as a bipolar high-voltage source through DC coupling and programmable DC offset control (0V to ±200V).

Technical Specifications Output Power & Voltage

17W RMS into 1 kΩ load, DC to 500 kHz; 5W RMS to 1 MHz

10W RMS into 600 Ω load, 100 Hz to 1 MHz

±200V peak (no load); ±184V peak into 1 kΩ, DC to 500 kHz

141V RMS no load; 130V RMS into 1 kΩ, DC to 500 kHz

±200 mA peak current, DC to 500 kHz (910 Ω load) Frequency Response & Distortion

±0.1 dB flatness, DC to 10 kHz

±0.25 dB to 200 kHz; ±0.5 dB to 500 kHz (0–130V RMS)

Harmonic distortion <0.01% to 5 kHz at 175V peak; 600 V/µs (400Vp-p); rise/fall time 120 ns (50Vp-p)

Dynamic range >80 dB

Hum and noise <10 mV RMS (2 MHz bandwidth, standard gain); <20 mV RMS at 28–42 dB gain range

Load regulation <0.1% (no load to 1 kΩ, DC to 10 kHz); 2% at 1 MHz Gain & Stability

Continuously variable 0–42 dB across three overlapping ranges (0–14 dB, 14–28 dB, 28–42 dB)

Gain accuracy ±0.1 dB plus frequency response specification

Line voltage stability <0.001 dB per 10% change

DC offset stability <1 mV per 10% line variation; <0.01%/°C temperature coefficient

Key Features

DC coupling supports both AC signal amplification and DC level shifting

Three gain ranges enable precision control across low and high amplitude signals

<0.5 Ω internal impedance (DC–10 kHz) minimizes load interaction

Maximum common-mode input ±200V peak (0–14 dB range)

Inverting (180° ±1°) and non-inverting (0° ±1°) inputs for flexible signal conditioning

Typical Applications

High-voltage transducer drive and sensor excitation

Audio power amplification with precision control

Reactive load driving (capacitive and inductive)

Precision test signal generation and function synthesis

Bipolar DC power supply simulation

Compatibility & Integration Accepts three input modes: A, A–B (differential), and –B (inverted). Input impedance specifications not stated. Maximum input voltage ±200V DC to ground without damage.