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18

Information - Help 
ID = 10701
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Vacuum Pentode   Power/Output 
Identical to 18 = 118_pent = 218_pent
Similar Tubes
Normally replaceable-slightly different:
  18E
Heater different:
  42
Other base:
  14F6
Successor Tubes 14F6  

Base 6-Pin-Base U6A, old, USA (Codex=Kdo)
Was used by Radio/TV-reception etc.
Filament Vf 14 Volts / If 0.3 Ampere / Indirect / Series, AC/DC /
Description

Maximum ratings : Va = 375 V, Vg2 = 285 V, Pa =11 W, Pg2 = 3,75 W; Vf/k = 90 V;
Class A1 operation: Va = 250 V; Vg2 = 250 V; Vg1 = -16,5 V; Ia = 34...36 mA; Ig2 = 6,5...10,5 mA; S = 2,5 mA/V; Ri = 80 k Ohms; Ra = 7 k Ohms; Rk = 410 Ohms; Po = 3,2 W; Vi = 16,5 V-eff; d-tot= 8 %
With exception of heater ratings and base, see more data under 6F6G. [JR]

 
Tube prices 0 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  valvula18.png
  18: Internet
Miguel Angel Trujillo-Rodriguez
 
18_2r.jpg
18: Collection JR
Jacob Roschy

 
470_1.png
18: Telefunken Werkstattbuch
Wolfgang Bauer

 
6f6_famdata.png
18: various sources
Jacob Roschy


Usage in Models 1= 1933 ; 4= 1935 ; 5= 1936 ; 1= 1937 ; 4= 1938

Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):15


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