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ID = 3675
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: Sylvania (Hygrade, GTE, Nilco); Emporium (PA) 
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to 14

Base UY-Base, 5 Pins (USA, April 1927) (Codex=Ha) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 14 Volts / If 0.3 Ampere / Direct / Specified voltage AC/DC

This tube was originally developed for Philco by Sylvania. A very few companies made the tube and it was made in the mid 1930's by General Electric as a replacement. It was only used in the Philco model 46 radio and was not on the market for long. The tube operated as a sharp cutoff tetrode and was used as a RF amplifier in line operated receivers. This tube had a 14 volt filament and was not interchangeable with any other tubes.

Dimensions (WHD)
incl. pins / tip
x 116 x 42 mm / x 4.57 x 1.65 inch
Information source -- Collector info (Sammler)   
Taschenbuch zum Röhren-Codex 1948/49   
14: Bob Millard collection
Fin Stewart

More ...
14: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20


from Just Qvigstad

Usage in Models 5= 1931 ; 1= 1932

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):6

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