Antique radios, Old Time Radios
812H
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Country:
United States of America (USA)
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| Identical to |
812H
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| Similar
Tubes |
Other class quality (otherwise equal):
812
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| Base |
UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Br)
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| Was used by |
Industrial |
| Filament |
Vf 6 Volts / If 4.5 Ampere / Direct / Specified voltage AC/DC |
| Description |
This tube is a variant ofthe 812, with a hard glass tubular bulb with a zircon impregnated graphite anode. It was advertised in the amateur market as a heavy duty replacement for the 812. It was also used in small medical diathermy machines. Only manufacturer known is United Electronics.
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Dimensions (WHD)
incl. pins / tip |
x 178 x 51 mm / x 7.01 x 2.01 inch |
| Weight |
100 g / 3.53 oz |
| Information source |
Taschenbuch zum Röhren-Codex 1948/49
Tube Lore (II) p. 77
-- Collector info (Sammler)
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812H: ARRL Handbook 1972
Anonymous 10 Collector
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Just Qvigstad
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Collection of
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