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26” (65cms) total length and
8”(20cms) bulb.
Early heavy duty stongly discolored tube of the 2nd decade,
made by the firm “Radiologie” in Berlin (which ceased to exist by WWII).
The Tungsten target is
embedded in a heavy copper anti-cathode in continuity with a long cooling
shaft running in a ceramic sleeve hermetically fused to the anti-cathode
structure, but staying outside the vacuum of the main tube. Extending out
of the tube, this shaft connects directly to the ribbed radiator.
Of particular interest is the
regeneration device consisting of a small black disc, probably of
carboniferous nature, firmly held between two mica discs.
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