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.
|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 |