Early Tube Electrodes

Two “heavy” copper anti-cathodes, with a centrally embedded tungsten target. Note the partly molten and severely crackled target in one of these anti-cathodes, due to extreme overheating. The anti-cathode to the right in the upper picture is wholly made of Tungsten and comes from an old 32”(80cms) long Coolidge type therapy tube, of unknown make. Note the 45 degree angle of the targets denoting they date before the “line focus” era, probably to the second decade, or early twenties of last century.

Three aluminium cathodes salvaged from old broken gas discharge tubes.

Note the severe discoloration on two of them.

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