Air-Cooled Machlett Tube (1915-1925) |
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| This rather massive tube’s most interesting feature is the hollow anticathode (target). The screen-covered open end of the glass arm housing the cathode is shown in the figure to the right. This opening permitted some degree of air circulation which helped prevent overheating during prolonged use. While the anodes of most tubes were disks, this tube employs an anode that comes to a sharp point. Another somewhat unusual feature is the fact that the regulator has two electrical contacts - the lead from one contact goes to the anode (and anticathode). |
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