Fast-response VHF-band pulsed power amplifiers

Two pulsed power amplifiers operating at a nominal 250 MHz, with a minimum 400 W peak power, were designed to meet the specifications for an application in a pulsed EPR (electron paramagnetic resonance) spectrometer. A thorough search revealed that there was no commercial, off‐the‐shelf amplifier available that would meet the specifications. Two vendors, Communication Power Corporation of Hauppauge, New York and Tomco Technologies of Norwood, South Australia, built amplifiers to the meet the specifications, and these were extensively tested, both as stand‐alone units and in the spectrometer application. A summary of the specifications and performance of both amplifiers is presented. © 2005 Wiley Periodicals, Inc. Concepts Magn Reson Part B (Magn Reson Engineering) 27B: 1–7, 2005