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ID = 35871
United States of America (USA)
Tube type:  Triple Triode   Power-supply 
  Late but very rare. ***
Identical to 7242 = CH1068
Similar Tubes
Other characteristic (electr. data):
Multiple differences or of other kind:

Filament Vf 6.3 Volts / If 7.5 Ampere / Indirect / Special heater – See text

Ruggedised power triple cathode triode designed as series regulator for power supplies. Similar to 7241 with higher mu. 100W total anode dissipation, mu 9, current limited to 300mA per cathode, 900mA total. Three cathodes with single grid and plate connections; hard glass bulb, 7 pin giant base. Anode is zirconium plated graphite and is supported by ceramic insulators. Gold plated molybdenum wires are used in the grid structure. In many circuits the 7242 can replace four 5998 regulator tubes.
Sylvania, Tung Sol and Chatham (CH1068)

Dimensions (WHD)
incl. pins / tip
59 x 152 x mm / 2.32 x 5.98 x inch
Weight 175 g / 6.17 oz
Information source - - Manufacturers Literature   
Tube Lore (I)   
Tube Lore (II)

7242_mazda_culot_s.png 7242: Mazda Belvu
Patrice Zeissloff

7242: Mazda Belvu Catalogue 1969
Patrice Zeissloff

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