Cold Cathode

• Villard Tube (ca. 1900)
• The “NitroKen” Nitrogen Tube
• The Focus Tube (1896) “Jackson’s”
• The “Platadium” Hydrogen Tube
• Swett & Lewis Therapy Tube (1898-1902)
• “STABIL” Tube by “Radiologie”
• Queen’s Self-Regulating Tube
• Pressler Ion Tube
• Macalaster & Wiggin “Transformer” Tube
• Large Size Villard tube
• The “Kesselring” Free Anti-Cathode Tube
• Heavy Anode Gas Discharge Tube
• H.G.Fischer Discharge Tube
• “Free anti-cathode” High Frequency Tube
• Early “VICTOR” Tube
• Early Swett & Lewis Tube
• Early Macalaster & Wiggin Tube
• Early Bulbar Tube
• Early Hooded Anti-Cathode Tube
• Cylindrical Focus Tube
• CHF Müller Tube
• Chabaud Tube
• “Campbell” Tube
• Bulbar Focus Tube
• Bulbar Focus Tube with Carbon regeneration
• “BETZ” Tube