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ID = 47659
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Transmitting Triode, air cooled   Power/Output 
  <1925 rare.
Identical to Z2B_Philips = Z-IIB
Similar Tubes
Other base:
  Z-IIA ; Z2A_Philips
Production stop 1927
Successor Tubes TA08/10  

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Transmittertube (Radio)
Filament Vf 6 Volts / If 2.7 Ampere / Direct

40W plate dissipation, 60mA at 500 to 1000V, gain 20. 4-pin single-ended base, otherwise similar to Z2A.
Advertised in 1923. Most of the Z types had a matching rectifier which were a look-alike of the Z type. The rectifier for the Z2B was the ZG2B which had no grid and grid connection. The Z and Zg tubes were replaced in 1927.

Dimensions (WHD)
incl. pins / tip
x 140 x 60 mm / x 5.51 x 2.36 inch
Information source -- Original prospect or advert   Di tubo in tubo, Soresini, pg 97
- - Manufacturers Literature   R38H 1-2-1925
-- Collector info (Sammler)

b4direct_5.png Z2B_Philips
Peter den Boer

Just Qvigstad
Z2B_Philips: own collection
Peter den Boer

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