Siemens Panoramic Dental Tube
The tube proper is
about 8” (20cms) long and 2.5” (6.2cms) in diameter. It is an oil immersed,
single focus (0.8 mm) tube, fitted with a hooded anode and a beryllium
window, and with a large size external aluminum heat sink, fixed to the anode
end of the tube. The strong discoloration of the glass is due to long use,
but the filament still tests OK. The small focus and
the relatively large anode fitted with the heat sink are typical of tubes
designed to withstand long exposures with a relatively low output and
intended to give acceptably sharp pictures with some magnification. These
specifications fit perfectly the requirements of panoramic dental x-ray
machines generally rated 50-80 Kilovolts, 10-15mA, and exposures of 10-15
seconds. Note the type number
of the tube, starting with the prefix “GE”. I wonder whether this has
anything to do with “General Electric” or it is just a fortuitous coincidence |
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