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In Europe, the principal method of numbering vacuum tubes ("thermionic valves") was the nomenclature used by the Philips company and its subsidiaries Mullard in the UK, Valvo(de, it) in Germany, Radiotechnique (Miniwatt-Dario brand) in France, and Amperex in the United States, from 1934 on. Adhering manufacturers include AEG (de), CdL (1921, French Mazda brand), CIFTE (fr, Mazda-Belvu brand), EdiSwan (British Mazda brand), Lorenz (de), MBLE(fr, nl) (be, Adzam brand), RCA (us), RFT(de, sv) (de), Siemens (de), Telefunken (de), Tesla (cz), Toshiba (ja), Tungsram (hu), and Unitra (pl; Dolam, Polam, Telam brands). This system allocated meaningful codes to tubes based on their function and became the starting point for the Pro Electron naming scheme for active devices (including tubes and transi

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  • Mullard–Philips tube designation
  • Codifica delle valvole termoioniche
  • ミュラード-フィリップス 真空管 規格
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  • In Europe, the principal method of numbering vacuum tubes ("thermionic valves") was the nomenclature used by the Philips company and its subsidiaries Mullard in the UK, Valvo(de, it) in Germany, Radiotechnique (Miniwatt-Dario brand) in France, and Amperex in the United States, from 1934 on. Adhering manufacturers include AEG (de), CdL (1921, French Mazda brand), CIFTE (fr, Mazda-Belvu brand), EdiSwan (British Mazda brand), Lorenz (de), MBLE(fr, nl) (be, Adzam brand), RCA (us), RFT(de, sv) (de), Siemens (de), Telefunken (de), Tesla (cz), Toshiba (ja), Tungsram (hu), and Unitra (pl; Dolam, Polam, Telam brands). This system allocated meaningful codes to tubes based on their function and became the starting point for the Pro Electron naming scheme for active devices (including tubes and transi
  • A partire dal 1930 è stato introdotto un sistema di identificazione delle valvole elettroniche Mullard-Philips che ha avuto grande diffusione in Europa e da cui è successivamente nato il codice Europeo dei transistor e dei circuiti integrati. Detta codifica consiste in due o più lettere seguite da due numeri (e.g. AZ41, UBC42, EF41, etc); esistono le valvole EM4 la cui sigla è seguita da un solo numero in quanto lo zero precedente il quattro è sottinteso.
  • ミュラード-フィリップス真空管規格(ミュラード-フィリップスしんくうかんきかく Mullard-Philips tube designation)とは、ヨーロッパにおいて真空管の番号付けを英国の社の慣例に従ってつけるようにした規格である。このシステムは番号を読むだけで真空管の特性が把握出来る為、真空管の時代が終了するまで続いた。 同様の参照に用いられるシステムは米国のとがあり、軍用では英国で(CV)番号があり、米国ではが存在する。 軍用の特別な品質の真空管にはヒーターの電源と真空管の形式の間に番号が表記される。一例として、EF80が特別品質として設計された場合、'E80F'と表記される。全ての特別品質品に当てはまる訳ではない。EF91の特別品質品は'M8084'として表記される。('M'はMullardを意味する)
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