Techron 7782

The AE Techron 7782 is a single-channel power amplifier from the 7000 series designed for high-current, high-voltage applications including EMC testing and MRI systems. This remanufactured unit delivers 3305 W RMS continuous into 2 Ω loads with peak bursts to 150 A into 1 Ω. Operating in voltage or current mode, the 7782 achieves up to 150 V peak and 92 A RMS (0.5 Ω, 5 min), with a 40 V/µs slew rate and gain of 20 V/V or 20 A/V depending on configuration. The amplifier operates DC to 50 kHz at rated power into 8 Ω, extending to 100 kHz at reduced power. Output offset remains under 5 mV (field adjustable to <1 mV), with ±1.5 mV DC drift. Multiple units interconnect for system outputs exceeding 500 V peak and 600 A peak. The 7782 accepts three-phase 208 VAC ±10%, 47–60 Hz input (20 A draw) and drives resistive and inductive loads of 2 Ω or less. Input impedance is 20 kΩ differential across balanced terminal blocks. Optional "P" variants provide precision offset control via 20-turn trim, achieving <200 µV output offset and <100 µV field adjustment.

– Technical Specifications

• Power Output: 3305 W RMS into 2 Ω; up to 150 A peak into 1 Ω (40 mSec bursts); 180 A peak for bursts below 20 kHz
• Voltage Output: Up to 150 V peak; 120 V RMS into 4 Ω; 500 V peak system maximum (multiple units)
• Current Output: Up to 92 A RMS (0.5 Ω, 5 min); 200 A system maximum (multiple units)
• Frequency Bandwidth: DC to 50 kHz at rated power (8 Ω); DC to 100 kHz at reduced power; DC to 200 kHz (7782HF variant, reduced power)
• Slew Rate: 40 V/µs
• Gain: 20 V/V (voltage mode); 20 A/V (current mode)
• Output Offset: <5 mV (adjustable to <1 mV); <200 µV (7782P/7782HC-P, adjustable to <100 µV)
• DC Drift: ±1.5 mV (7782/7782HC)
• Input Impedance: 20 kΩ differential
• Power Supply: Three-phase, 208 VAC ±10%, 47–60 Hz; 20 A draw

– Key Features

• DC-coupled voltage and current operation modes
• Field-adjustable output offset and precision trim control (P models)
• Designed for loads ≤2 Ω
• Modular design allows unit interconnection for scaled voltage and current outputs

– Typical Applications

• Electromagnetic compatibility (EMC) testing
• MRI system excitation and control
• High-current pulse generation
• Transducer drive circuits requiring precise gain and low drift

– Compatibility & Integration

Multiple 7782 amplifiers interconnect to achieve combined system performance: up to 800 V and 70 A maximum in specific configurations (e.g., 7782HF/HC variants). Balanced differential input via terminal block simplifies integration into automated test benches.