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E3730A OPERATING INSTRUCTIONS
ceramics. The electron gun assembly must be sealed with a plastic cover preventing the insulating
ceramics from stains.
Because of the size of this tube, it is not abnormal to observe changes in the internal
vacuum during storage. To be able to put the stored klystron into operation quickly, the klystron ion
pump shall be operated all the time. It is mandatory that the ion-pump current be verified every
month.
When the stored tube comes back to operation, the same conditioning operation as for a
new tube must be applied.
The non-observation of these storage instructions can cause the manufacturer's guarantee
to become null and void in the case of an irremediably fault of the klystron.
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