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ID = 37935
Brand: Thomson (marque), Thomson-Houston (CFTH); Paris
Developer: Thomson (marque), Thomson-Houston (CFTH); Paris 
Tube type:  Vacuum Pentode   clamp grid   Universal 
Identical to PTT216 = R154
Similar Tubes
Normally replaceable-slightly different:
  404A ; 5847
Other base and data slightly different:
First Source (s)
Jun.1952 : Onde Electrique n°303 Juni 1952

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AC/DC
Description Long life pentode (16000h) for broadband amplifier
Anode and grid 2 voltage : 150V, anode current : 12,3mA, grid current 2 : 3,7mA, grid 1 voltage : -1,75V, transconductance : 13,5mA/V
Tube developed by the CSF as the equivalent of U.S. tube 404A/5847
Source : Onde Electrique n°303 june 1952 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
45 x 27 x mm / 1.77 x 1.06 x inch
Tube prices 1 Tube prices (visible for members only)
Information source
PTT216: Collection JR
Jacob Roschy

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Emilio Ciardiello

PTT216: L'onde électrique n°303
Patrice Zeissloff

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