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ID = 35032
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Double Triode 
Identical to 407B
Similar Tubes
Different maximum ratings:

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament Vf 40 Volts / If 0.05 Ampere / Indirect
Description Miniature twin triode, for use in carrier repeater equipment having heaters and plate series supplied through cable pairs. Heater can be connected for 20V, 100mA operation. 'B' was uprated to 1.6W, 130V cathode to heater and 6.0mS Gm.
WE known manufacturer. 
Text in other languages (may differ)
Information source Tube Lore (I)   
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407b_so.png 407B: Ratheiser
Anonymous 10 Collector

Just Qvigstad

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