Gene Heskett wrote: > A > water cooled anode that required deionized water in the coolant system > because the tubes anode had 7200 volts on it. This tube was rated to make > 85 kilowatts (sync tip peak) of power in the low vhf band, but our > transmitter let it relax with its feet up on the coffee table because we > only needed 26.7 sync tip peak to make our power. > Up at Michigan State University's National Superconducting Cyclotron Lab they have two cyclotrons. Each has 3 transmitting tubes, as they have 6 Dees, 3 grounded and 3 live, with 120 degree phase relationship. Kind of like 3 phase mains power only at 14 MHz or something. The main DC supply is 18 KV at 42 amps. That is 756 KW of DC power! I know the smaller cyclotron has smaller transmitting tubes in it, but that averages out to 126 KW per tube! They really aren't very big, either. (Just to be clear, the 42 A is not the rating, it is the ACTUAL load as read off the meters.) Almost all of this power is turned into RF heating of the inside of the cyclotrons.
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