The LSD7 is a Xenon flash tube designed for studio photo-flash equipment.The maximum energy is a 200 Joules the same as a mid energy studio flash of today. The maximum anode voltage is 2,700 Volts and the breakdown voltage is greater than 3,000 Volts. The trigger electrode would normally receive a pulse of 5 kV or so. The Xenon gas filling gives a colour temperature for the discharge that corresponds to noon daylight, approx 5,500 °K.The flash duration given is 200 μs. Modern units for studio work operate at about 400 Volts and the flash duration is about 1 ms. The tube life is given as a minimum of 10,000.![](../pics/aaa1439a.jpg)
The mesh surrounding the centre leg of the flash tube is the trigger electrode.The envelope is 30 mm in diameter, and excluding the UX4 base pins is 90 mm tall.Reference: Data-sheet. |
Absolute Maximum Operating Conditions¶
| Va | ![](../static/pdflogo.gif)
| 2,500 |
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PDF scanned from an original document held by the museum |
Updated February 21, 2014.
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