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69_Sylvania

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ID = 80302
       
Country:
United States of America (USA)
Brand: Sylvania (Hygrade, GTE, Nilco); Emporium (PA)
Developer: Sylvania (Hygrade, GTE, Nilco); Emporium (PA) 
Tube type:  Wunderlich Tube   Text 
  Late but very rare. ***
Identical to 69_Sylvania
Similar Tubes
Heater different:
  29
Differences not known by us:
  WunderlichA-Auto
Base 6-Pin-Base U6A, old, USA
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.4 Ampere / Indirect / Specified voltage AC/DC
Description

This tube was a double grid detector-amplifier developed by Sylvania. Few manufacturers were interested in this 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 = 5 mA
Gm = 1400 µmhos
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)   
Tube Lore (II)   p. 26 & 28
sylvania_69_pin_ass..png 69_Sylvania: Fin Stewart
Fin Stewart

Just Qvigstad
 
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