Antique radios, Old Time Radios
R81_USA
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Country:
United States of America (USA)
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| Identical to |
R81_USA
= AC81
= G81
= UX281
= CX381
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| Similar
Tubes |
Normally replaceable-slightly different:
1562_UX4-pin
; 281
; 81
; R281
Other base:
1562
|
| First Source
(s) |
1928 : Saga of the Vacuum Tube, Tyne p.344
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| Base |
UX-Base (4 Pins (2 thick, USA 1924, UX)
|
| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 7.5 Volts / If 1.25 Ampere / Direct / Specified voltage AC/DC |
| Description |
Tube also made by the National Radio Tube co of San Francisco.
|
Dimensions (WHD)
incl. pins / tip |
x 145 x 62 mm / x 5.71 x 2.44 inch |
| Weight |
63 g / 2.22 oz |
| Information source |
-- Collector info (Sammler)
Philips Bulletin Philips Radiolamp equivalents R1164, p. 10
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren
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R81_USA: ARRL Handbook 1972
Anonymous 10 Collector
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Just Qvigstad
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Collection of
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line up.
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