|Soviet IV-4 VFD Tube
|Written by AnubisTTP on 2010-04-07
The IV-4, a Soviet tube, is one of only a handful of single digit alphanumeric VFD tubes available. This large VFD display tube has a 17 segment display with left and right commas, for a total of 19 controllable display elements. This tube has a proper control grid for multiplexing, unlike some earlier single digit VFD's such as the Y-1938, shown above. The tube has a 22 pin flying lead base and can be directly soldered into a PCB without need for a special socket.
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Soviet IV-4 VFD tube, normal operation.