• Country
• Netherlands

• Manufacturer / Brand
• Philips; Eindhoven (tubes international!); Miniwatt

• Year
• 1923–1925

• Category
• Service- or Lab Equipment

• Radiomuseum.org ID
• 214003

• Number of Tubes
• 1

• Valves / Tubes
• 454_Philips

• Wave bands
• - without

• Power type and voltage
• AC/DC-set / 110/220 Volt

• Loudspeaker
• - - No sound reproduction output.

• Material
• Bakelite, TUBES VISIBLE

• from Radiomuseum.org
• Model: Tube filament tester 453 - Philips; Eindhoven tubes

• Dimensions (WHD)
• 150 x 150 x 0 mm / 5.9 x 5.9 x 0 inch

• Notes
• To check filament continuity of early E3 and E4 base tubes. The 453 is a Miniwatt tester and the first Philips Miniwatt’s were the B2 and D6 tubes in 1923. There are tipped ones and tipless ones. They were also the first tubes with getter and you can not see the filament. That will be the reason for making the 453. In 1925, the tube filament tester 453 was already obsolete because it can not test the emission of a tube and the anode current became much bigger. The neon indicator bulb with spiral anode was made first with a metal base and tip and later with a moulded base, clear and tipless.
  
  Heizfaden-Durchgangsprüfer für Röhren mit E3 und E4 Sockel.

• Net weight (2.2 lb = 1 kg)
• 0.340 kg / 0 lb 12 oz (0.749 lb)

• Author
• Model page created by Fin Stewart. See "Data change" for further contributors.

• Other Models

• Here you find 5242 models, 4383 with images and 3445 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Philips; Eindhoven (tubes international!); Miniwatt