The Krohn-Hite Models 7600 and 7602 are 17 and 34 watt, wideband power amplifiers that offer extended output power and voltage capabilities, low distortion, versatility and the latest in hybrid CMOS power operational amplifier technology with performance features not available in other power amplifiers.
MODEL 7600
The Models 7600 provide 17 watts of continuous power (34 watts at dc) and 141V rms from dc to 500kHz. The frequency response of the 7600 is ±0.1dB to 10kHz, and the distortion contributed by the amplifier is <0.01% to 5kHz and <0.3% to 100kHz. The voltage gain can be either inverting or non-inverting and has selectable ranges from 0dB-14dB, 0dB-28dB and 0dB-42dB, and is continuously variable between ranges.
Other features include: modes of A, A–B and –B, common mode rejection of 80dB, input coupling of ac or dc, dc offset control that is variable from 0V to ±200V; an optional meter package that provides a meter for displaying the heat sink temperature in C, output peak voltage and average output current.
APPLICATIONS
The Models 7600 and 7602 are two of the only amplifiers on the market today that offer a combination of power, performance and versatility over the range of dc to 1MHz. With the ability to drive either resistive or reactive loads, together with its power and voltage capability, low distortion, and flat response make the Models 7600 and 7602 ideally suited for applications such as driving piezo electric transducers, ion beam deflection, vacuum tube driver, meter calibration, ink jet testing and design; and with the dc coupling and variable dc offset control each amplifier can function as a bipolar high voltage power supply.
SPECIFICATIONS
OUTPUT (All rms values are for sinewave signals)
For the Model 7602, specifications apply to each output to ground.
Frequency Range: dc to 1MHz.
Power:
1k Ohm Load: 17W rms, 34W dc and peak, dc to 500kHz; 5W rms to 1MHz.
600 Ohm Load: 10W rms, 100Hz to 1MHz; 5W rms, 10W dc and peak, dc to 100Hz.
Voltage:
No Load: ±200V dc and peak, 141V rms.
1k Ohm Load: ±184V dc and peak, 130V rms, dc to 500kHz; ±113V peak, 80V rms at 1MHz.
600 Ohm Load: ±113V peak, 80V rms, 100Hz to 1MHz; ±78V dc and peak, 55V rms, dc to 100Hz.
Current: 910 ohm load, ±200mA peak, 141mA rms, dc to 500kHz.
Frequency Response: ±0.1dB, dc to 10kHz; ±0.25dB to 200kHz; ±0.5dB to 500kHz, 0-130V rms; ±0.5dB to 1MHz 0-80V rms.
Harmonic Distortion: <0.01% to 5kHz and 175V peak output, <0.05% 200V peak output; <0.3% to 100kHz.
Voltage Gain: 0dB to 42dB in three ranges; 0dB to 14dB, 14dB to 28dB, 28dB to 42dB; continuously variable between ranges.
Step Accuracy: ±0.1dB plus frequency response specification. Gain steps are 14dB or a voltage gain of 5.
Stability: <0.001dB change for a 10% change in line voltage.
Dynamic Range: >80dB.
Hum and Noise (2MHz bandwidth): referred to output, <10mV rms; <20mV rms on the 28dB to 42dB gain range.
Phase Shift: A input 0 ±1 , B input, 180 ±1 dc to 10kHz increasing linearly 60 lagging at 1MHz. Model 7602: (Inverted output relative to non-inverted) 180 , –0.3 at 10kHz; 180 , –3 at 100kHz; 180 , –20 at 1MHz.
Squarewave Response:
Rise/Fall Times: 120ns to 50Vp-p.
Slew Rate: >600V/us, 400Vp-p.
Aberrations: <5%.
Regulation: <0.1%, No load to 1k ohm load from dc to 10kHz; rising to 2% at 1MHz.
Coupling: DC.
DC Level: Nominal zero volts; vs. temperature, 2mV/ C.
DC Offset Control (no load): 0V to ±200V.
DC Level Stability:
Vs. Line: <1mV for a 10% change in line voltage.
Vs. Temperature: <0.01%/ C or 2mV/ C whichever is greater.
Internal Impedance: <0.5 ohm, dc to 10kHz; 5 ohms at 100kHz; 20 ohms at 1MHz.
Output Protection: Protected from overloads with a unique foldback limiter which keeps the output current within safe operating regions. Kickback diodes clamp kickback voltages to the supply.
INPUT
Modes: A, A–B, –B.
Maximum Voltage (without damage): ±200V dc referred to ground.
Maximum Common Mode: 0dB to 14dB range, ±200V peak; 14dB to 28dB range, ±40V peak; 28dB to 42dB range, ±8V peak.
Common Mode Rejection: 80dB, dc to 200Hz; 60dB to 1kHz; 40dB to 10kHz; rising to 20dB at 1MHz.
Sensitivity: ±1.6V peak.
Coupling: Direct (dc) or capacitive (ac) with low frequency cutoff of approximately 1Hz.
Impedance: 1M ohm in parallel with 30pF with front inputs only; 65pF with front and optional rear inputs, independent of input gain setting.
GENERAL
Load Impedance: Capable of driving any resistive load within the current and voltage limitations of the amplifiers foldback limiter. Capable of driving reactive loads within voltage and current limitations.
Temperature Range: 0 C to 45 C.
Controls, Terminals and Indicators:
Front panel: Power switch, 5-position input MODE switch, 2-position INPUT COUPLING switch, 3-position
GAIN control switch, variable GAIN dB potentiometer, 10-turn variable DC OFFSET potentiometer,
3-position offset RANGE switch, output CONNECT/DISCONNECT switch.
Rear panel: CHASSIS/FLOAT GROUND switch.
Front Panel Warning LED Indicator: CLIPPING.
Terminals: BNC A input, BNC B input, binding post output.
Rear Panel: Power receptacle, optional BNC input and binding post output.
Power Requirements: 90-132/198-264 volts, 50Hz-400Hz, 200 watts.
Dimensions and Weights: 3.5" (9cm) high, 8.5" (21.8cm) wide, 18" (46.2cm) deep; 12 lbs (5.4kg) net, 14 lbs (6.3kg) shipping.
Accessories: 3-terminal line cord, operating manual.
