Antique radios, Old Time Radios
428A
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Country:
United States of America (USA)
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| Identical to |
428A
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| Base |
Octal with RF-contact (long)
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| Filament |
Vf 6.3 Volts / If 0.4 Ampere / Specified voltage AC/DC |
| Description |
Relex klystron similar to 723A/B as format and base, tunable from 6.4 to 7.2GHz. 330V. Intended for use in a 7GHz television relay system.
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| Information source |
Tube Lore (I)
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428A
Emilio Ciardiello
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Just Qvigstad
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Collection of
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