Antique radios, Old Time Radios
29
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Country:
United States of America (USA)
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| Identical to |
29
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| Similar
Tubes |
Heater different:
69_Sylvania
Differences not known by us:
Wunderlich
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| Base |
6-Pin-Base U6A, old, USA
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2.5 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC |
| Description |
This tube is a double grid detector-amplifier developed by Sylvania, who made this tube in limited quantities. A "daylight" blue glass tube was also made but it is suspected these tubes were made by Arcturus for Sylvania. Few manufacturers were interested in this design of tube and it had a short commercial life.
Operating data according to Fritz Röhren-Vademekum 1948:
Vp = 180 V
Vg' = -3 V
Vg" = -3 V
Ip = 4.5 mA
Gm = 1400 µmhos
Rp = 20 kohms
µ = 30
Text in other
languages (may
differ)
|
Dimensions (WHD)
incl. pins / tip |
x 103 x 38 mm / x 4.06 x 1.50 inch |
| Weight |
34 g / 1.20 oz |
| Information source |
-- Collector info (Sammler)
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29: Fin Stewart
Fin Stewart
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Just Qvigstad
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Collection of
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| Data Compliance |
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