Antique radios, Old Time Radios
HK257B
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Country:
United States of America (USA)
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| Identical to |
HK257B
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| Similar
Tubes |
Normally replaceable-slightly different:
4E27A/5-125B
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| Base |
(Codex=My)
Top contact with a cap.
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| Was used by |
Transmittertube (Radio) |
| Filament |
Vf 5 Volts / If 7.5 Ampere / Direct |
| Description |
Heintz & Kaufman transmitting pentode equivalent to 4E27A.
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Dimensions (WHD)
incl. pins / tip |
x 157 x 70 mm / x 6.18 x 2.76 inch |
| Information source |
Tube Lore (II) p. 218
Tube Lore (I)
Taschenbuch zum Röhren-Codex 1948/49
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