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 in Germany, and Dario in France, from 1934.
Philips | Philips Records | The Tube | Cathode ray tube | Bayer designation | X-ray tube | The Tube (TV series) | The Groove Tube | Foreign Narcotics Kingpin Designation Act | Ambrose Philips | tube | Traveling-wave tube | Tottenham Court Road tube station | Philips Stadion | Philips Arena | cathode ray tube | Youngstown Sheet & Tube Co. v. Sawyer | Westbourne Park tube station | Tube Tales | Torpedo tube | Shoot 'em up#Tube and rail shooters | Piccadilly Circus tube station | Peter and the Test Tube Babies | Chuck Philips | Aldwych tube station | Youngstown Sheet and Tube | Tube | South Kensington tube station | Philips' | Peter Philips |
So popular was Mullard's character that a sequel — Yus, My Dear — was broadcast in 1976, in which Wally and his wife Lily (Queenie Watts) had moved out of their caravan into a council house.
Mullard joined the IEE as a student member in 1903, became a full member in 1910, and a fellow of the IEE in 1928.