Amplifier Research 250L Solid State RF Amplifier 10 kHz - 220 MHz

Need Help? Call (800) 404-2832ATEC AssuranceWorldwide Delivery
Amplifier Research 250L Solid State RF Amplifier
Enlarge Image
Amplifier Research 250L
Request Quote Print Page
250L Datasheet Supplemental Document

The Model 250L is a self contained, forced air cooled, broadband amplifier that features instantaneous bandwidth, high gain and moderate power output. It employs all solid state, MOSFET low power stages and a vacuum tube final amplifier. To increase its versatility for laboratory applications, both CW and PULSE modes are provided. All control and protection circuits use solid state logic. Overload comparators are used in both the CW and PULSE modes to safeguard against overdrive or excessive pulse lengths. In addition, the final amplifier tubes are protected by a high speed crowbar circuit.

Easily accessible, rear mounted test points and LED indicators provide monitoring of operating voltages and currents. Remote control is provided through a rear panel mounted connector. Isolated TTL level remote control can be accomplished using our CP2001 interface. Isolated IEEE- 488 compatible control can be provided with our Model CP3000. A continuously variable RF input attenuator conveniently located on the front panel permits operator adjustment of the output power as required. The Model 250L is useful in many applications such as RF susceptibility testing, plasma experiments, ultrasonics, and RF heating.
Amplifier Research 250L Specs
Power Output
Pulse Mode Minimum 750 Watts
CW Mode
Nominal 370 Watts
Minimum 250 Watts
Flatness ± 1.5 dB
Frequency Response 10 kHz - 220 MHz instantaneously
Input For Rated Output 1.0 milliwatt maximum
Gain (at maximum setting) 54dB minimum CW, 59dB minimum Pulse
Gain Adjustment (continuous range) 18 db minimum
Input Impedance 50 ohms, VSWR 1.5:1 maximum
Output Impedance 50 ohms, VSWR 2.0:1 maximum
Mismatch Tolerance

100% of rated power without foldback. Will operate without damage or oscillation with any magnitude and phase of source and load impedance.

Modulation Capability

Will faithfully reproduce AM, FM, or Pulse modulation appearing on the input signal.

Weight 84 kg
Cooling Forced air (self contained fans)
RF Input Type BNC female
RF Output Type N female
Gating/Blanking Type BNC female
Remote Control 25 pin female subminiature D