Antique radios, Old Time Radios
7242
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Country:
United States of America (USA)
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Brand:
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| Tube type: |
Triple Triode Power-supply |
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Late but very rare. *** |
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| Identical to |
7242
= CH1068
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| Similar
Tubes |
Other characteristic (electr. data):
7241
Multiple differences or of other kind:
6337
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| Filament |
Vf 6.3 Volts / If 7.5 Ampere / Indirect / Special heater – See text |
| Description |
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)
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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)
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7242: Mazda Belvu
Patrice Zeissloff
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7242: Mazda Belvu Catalogue 1969
Patrice Zeissloff
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