Decoding type numbers

• Transmitting valves- old system: AAnn/nn, AAnn-nn e.g. QQV03/10, KS9-20
• Cold cathode tubes ZnnnA e.g. Z803U
• Receiving valves - (often called Mullard code) e.g. ECC83, E88CC
• Phototubes and photomultipliers (old system) nnAA e.g. 90AV
• Voltage stabilisers (old system) e.g. 150C2
• Professional tubes: AAnnnn e.g. YL1080
• Special purpose types: nAnn e.g. 1B59
• GEC/Marconi/Osram e.g. KT66
• American RETMA designation system e.g. 12AU7
• Cathode Ray Tubes
• CRTs - Old system
• CRTs - American RETMA system
• Mazda code e.g. 10P14, U52
• French Mazda
• Visseaux
• STC/Brimar code
• Ericsson code
• RAF e.g. VR100
• British Army e.g. ARP12
• Royal Navy e.g. NR49
• German Army/Navy
• German Air-force
• French Army
• Mazda TV tube code
• Old Philips code
• Russian valves
• Transmitting valves: AAnnAA format e.g. RD150YB
• Sperry microwave valve designations e.g. SAL39
• CV types