High Voltage Power Supply
An adjustable power supply furnishes up to 120 kV at 4.4 †Е. The voltage charges the 37.2 €ІF capacitor bank. When the transmitter is pulsed, the klystron pull high current from the capacitor bank. The power supply is behind a locked door in the high voltage vault.
Crowbar
The Crowbar circuit provides path by which nearly all the charge in teh capacitor back can be dumped to ground, rather than through an arc inside one on the klystrons. Two fault conditions indicating an internal arc can trigger the crowbar to fire; excessive pulse lenght and a sudden increase in body current., The term "crowbar" probably is used to suggest a heavy metal bar used to produce a sudden short.
