Tube Discussion

Topics

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[1] Case Research Lab

[2] Lighting OC3 Voltage Regulator Tube

[3] Age of Blue or Red Glass Seals in Geissler & Crookes Tubes?

[4] Mercury vapour advertising tube

[5] Can you ID this mystery tube/bulb?

[6] anyone know what this is?

[7] Coolidge \

[8] Scientific Glassworks of India (Geissler, Discharge Tubes)

[9] Info needed on very large tube

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