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ID = 41255
Brand: Common type Worldwide tube/semicond.
Tube type:  Double Triode   Audio Frequency 
Identical to CV4017
Similar Tubes
Normally replaceable-slightly different:
Other class quality (otherwise equal):

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament Vf 12.6 Volts / If 0.175 Ampere / Indirect / Specified voltage AC/DC
Description Special ruggedised tube. Specification similar to 12AX7, dual high-gain triode. Mu lowered to 70, heater current raised to 175mA per section.
Heaters can be parallel connected for 6.3V, 350mA operation. 
Information source -- Original-techn. papers.   

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