typenummer Philips lampentester (Algemeen)

door verdicom , Maarssen, 25-04-2012, 14:37 (390 dagen geleden) @ buurjongen

Hallo Henk,

Dit zou kunnen zijn de Philips "Tube filament tester" type 453
Uit 1923/1925, met dit verhaaltje er bij:

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.
Bron: Radiomuseum.org

Groet,
Han