Amplifier Research 1000LM20 10 kHz - 220 MHz 1000W

Amplifier Research 1000LM20, 10 kHz - 220 MHz
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The Amplifier Research 1000LM20 is a self-contained, broadband amplifier intended for laboratory applications where instantaneous bandwith, high gain and high power output are required. When used with a swept frequency signal source it will provide a minimum of 1,000 watts of swept CW power. Provisions are included to obtain outputs of 100 watts CW as well as 2,500 watts when excited with a Gate/Blank input in pulse mode having a duty cycle of 15% or less. The unit employs the most up-to-date design technology in both its solid state low level amplifier and vacuum tube Driver and Final Amplifier. A crowbar circuit shuts down the high voltage within 30 microseconds should an arc or fault develop in a tube. All operating controls are functionally grouped on the front panel to simplify operator use. They include modern, lighted push-button switches for the command functions: POWER, STANDBY, OPERATE, PULSE, a gain control for setting the output level of the amplifier, and a switch to select outputs of either 100 watts or 1,000 watts CW (2,500 watt pulses). A single meter and selector switch are provided for monitoring the operating voltages and circuits of both the Driver and Final Amplifiers as well as the 3 phase line voltages.

Unique circuitry developed by Amplifier Research permits operation without shutdown or damage regardless of source or load impedance thus making the unit the most versatile unit available for laboratory use. Typical applications include antenna and component testing, wattmeter calibration, EMI susceptibility testing, and NMR applications.



Power Output High Range
CW mode, saturated: 1200 Watts nominal
1000 Watts minimum
CW mode, 1.0 dB compression: 750 Watts minimum
Pulse mode, 8 milliseconds, 15% duty: 2500 Watts minimum to 150 MHz
1750 Watts minimum to 220 MHz
Power Output Low Range 100 Watts nominal
Flatness, high range ±1.5 dB
Frequency response 10 kHz - 220 MHz instantaneously
Input for rated output 1.0 milliwatt maximum
Gain (at maximum setting) High Range: 60 dB minimum
Low Range: 47 dB minimum
Gain Adjustment (continuous range) 18 dB minimum
Input Impedance 50 Ω, VSWR 1.5:1 maximum
Output Impedance 50 Ω, nominal
Mismatch Tolerance 100%, will operate without damage, foldback or oscillation with any magnitude and phase of source and load impdedance
Modulation Capability Linear amplitude and phase response to over 80 MHz allows faithful reproduction of AM, FM, pulse, or phase modulation appearing on the input signal
Harmonic Distortion Above 120 MHz: Minus 30 dBc maximum
Below 120 MHz: Minus 15 dBc maximum
Minus 18 dBc nominal
Gating Characteristics Pulse mode pedestal/CW mode blanking: Signal (into 180 Ω): Plus or minus 2.5 to 6.0 VDC
Rise Time: 20 microseconds maximum
Fall Time: 4 microseconds maximum
RF Rise/Fall Time: 10 nanoseconds maximum
RF Pulse Droop: 1.0% maximum at 8 milliseconds
Primary Power (specify one) 200/208 ±5% VAC, 3 phase, 50/60 Hz
380/415 ±5% VAC, 3 phase, 50/60 Hz
15.2 kVA nominal
Connectors RF input: Type BNC female
RF output, high range: Type 7/16 female
RF output, low range: Type N female
Gating/Blanking: Type BNC female
Remote Control: 25 pin female subminiature D
Cooling Forced air (710 1/sec min)
Weight 239 kg (525 lb)
Size (W x H x D) 56.1 x 149.9 x 58.4 cm
22.1 x 59.0 x 23.0 cm