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ID = 2446
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Space Charge Tetrode 
Identical to A141
Similar Tubes
Normally replaceable-slightly different:
Other base:
First year 1925 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
1924 : Saga of the Vacuum Tube, Tyne p.421

Base Europe 4-Pin B4 + side contact
Filament Vf 1.3 Volts / If 0.06 Ampere / Direct / Battery =

Heizung 1 - 1,3V/0,08A; Sättigungsstr. 10mA; Ruhestrom 4,5mA; Anodenspannung 2 - 20V; Verstärkungsfaktor 4,5; Durchgriff 22%; Steilheit 1mA/V; Innerer Widerstand 4500Ω; Anwendung: H.A.N.L.; Preis 1927: 17,50ATS. Daten aus dem WEKA-Katalog 1927, Seite 163.

Information source Radios von gestern, 2. Auflage   Seite 227
A141: Sammlung
Anonymous 557 Collector

More ...
A141: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20

A141: own collection
Peter den Boer

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from Just Qvigstad

Usage in Models 4= 1925 ; 3= 1927 ; 1= 1928 ; 1= 1929 ; 1= 1930 ; 1= 1933

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):11

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