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| The tent at the feet of the transmitter mast serves as stores. In the back one can see at left the workshop container. The automobiles surrounding the central building indicate the activities at the site. | Part of the covered trench with warning. During the period of heating a current of 600 A flows through the tube. | |
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| The control room in the central building. Harald and Benno supervise the activities. | Ken and David control the modulation index of the Pockels cell. The vacuum chamber contains the reference cavity of the frequency stabilization. | |
