[Amps] care and feeding

[Paul Decker]

Hi guys, 



I'm reading over the Eimac "Care and feeding of power tetrodes" because it came up in a search I did. 



page 8, figure 17 shows a cavity and says "Schematic cavity section of 1250 Mc. amplifier employing 4x150G tetrode" 



Does anyone have any information on a 1250 Mc cavity amp?  Did eimac actually make the cavities or was that up to the end user?  Roughly what could I do to figure out what frequency a cavity is for? 



thanks, 

Paul, kg7hf