I have a Nixie display assembly that I'm trying to identify. Does anyone recognize the device this assembly may have come from? If so, please send me an e-mail! There are a total of 28 Burroughs B-5750 Nixie tubes in this assembly, 14 in each of two Nixie Display Modules.

The assembly is made up of two separate modules connected together by machine screws and stand-offs.

Each tube has an associated drive transistor, an RCA 40412 power transistor.

Each module is labeled as "GP40 NIXIE DISPLAY".

Each module has two cables, one from each side, that are terminated in a DIP (dual in-line package) connector. The left-hand side connector is a 14-pin DIP and appears to be the digit selector as well as the anode connection. The connector has only 13 pins -- one pin location is empty. The right-hand side connector is a 16-pin DIP and looks to be the tube selector, one line for each of the 14 tubes in the module. The connector has only 14 pins -- two pin locations are empty. Each pin is connected to a corresponding drive transistor.

The printed circuit board is silkscreened with identifiers where the left-hand connector cable is soldered to the module. Identifier   Description 5   Digit 5 6   Digit 6 9   Digit 9 0   Digit 0 7   Digit 7 8   Digit 8 2   Digit 2 1   Digit 1 4   Digit 4 3   Digit 3 A   Anode DP   Decimal Point

The silkscreen on the underside of each module is labeled "BSL NDM901B".