The TBL-2000 and TBL-2000X are uniquely designed linear amplifiers operating in class AB passive grid-driven service. The TBL-2000 has a built-in power supply for 240VAC 50/60Hz operation. The TBL-2000X has a built-in 120VAC/240VAC 50/60Hz power supply. Two plug-in AC power cords are supplied with the TBL-2000X to make switching from 120VAC to 240VAC a snap. Both amplifiers have a tube compliment of five hefty 6LF6 power pentodes. Each tube has its own side-panel bias-potentiometer for peak performance. Operating 160 thru 10 meters, the TBL-2000 and TBL-2000X will produce input powers of 1000 watts CW, 700 watts RTTY, and 2000 watts SSB, ALC controlled. The TBL-2000 and TBL-2000X are fully metered. With a flip of the meter switch, you can monitor the cathode currents of each tube, B+ voltage, total plate current, RF watts and much, much more. Assembled in an elegantly styled, RF tight cabinet, the TBL-2000 weighs but 22 pounds and the TBL-200GXweighs a hearty 24 pounds. With our efficient cooling system, the TBL-2000 and TBL-2000X will remain cool even after hours of operation. Standard features include: built-in T/R relay, ALC adjust, two-position tilt-stand, illuminated panel meter, built-in AC power supply, and much, much more.