User manual – Glass Clock Design #3
rev 3.2
!
Cold War Creations, 2014
5
Nixie tubes require high voltage with special drivers for each digit,
provided by a special high voltage converter on the circuit board. There
are many failure modes for Nixie tubes: Breakage of the glass tube, loss
of seal between the metal pins and the glass, and cathode poisoning.
Cathode poisoning is when unused or seldom-used digits acquire a
coating of material “sputtered” off of the active digits. This coating
insulates the metal, making it difficult for the digit to glow.
The tubes used in this clock are Russian (Soviet) military tubes. The
Soviets, seeing the Western Nixie, came up with their own versions with
similar sizes and shapes. Unlike the U.S. Tubes, they were manufactured
well into the 1980's. Since the collapse of the Soviet Union, these tubes
became available on the surplus market. This clock contains the IN-14
series of tubes. One interesting feature is the ‘5’ digit. It is actually the ‘2’
digit upside down and reversed, making for a very unique looking ‘5’.
This clock uses socket pins for the Nixie tubes. The pins allow tubes to
be changed out without soldering. The pins are very small so as not to
change the look of the clock.
Содержание Glass Nixie Tube Clock #3 IN-14
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