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Old 19th June 2007, 04:39 AM   #1
jlsem is offline jlsem  United States
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Default WE427A Cold Cathode Diode

http://www.westernelectric.com/spec_sheets/427A.pdf

Is the "starter" (pin 7) on this tube an auxillary element for use in dark or cold ambient temperature environments, or is it always necessary to have it connected?

Thanks,
John
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Old 19th June 2007, 05:07 PM   #2
kevinkr is offline kevinkr  United States
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I've never used one of these, but I' m assuming the starter electrode would be connected either directly or through a resistor to the anode of the reference tube. (I'd try the resistor frankly)

I assume you would connect the starter electrode under all conditions of use in order to assure starting at the stipulated 135V.
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Old 19th June 2007, 10:59 PM   #3
jlsem is offline jlsem  United States
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I'll go ahead and breadboard it both ways.

Thanks,
John
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