Early Macalaster & Wiggin Tube





16 (40cms) long, 5 (12.5cms) bulb.

This tube of the first years of the 20th Century, with a platinum foil target backed by a relatively massive anti-cathode acting as a small heat sink, illustrates the transition between light anti-cathode tubes and later tubes with heavy anti-cathodes supporting tungsten targets.


Concave shaped aluminum cathode and anode electrodes.


The regeneration device contains some grayish fibrous material, probably asbestos



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