Anode terminals on 5870

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Paolo Cravero

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Dec 27, 2016, 5:27:17 AM12/27/16

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Hello.

I am about to test and the do something with a bunch of 5870S tubes, both ITT and Siemens.

From the datasheet I see there are two anode terminals, but there is no indication of a reason. Were they made to simplify wiring? Or to make the anode more stable? Should they always be connected together? Can one be let floating?

For a test I wired only one anode and all digits light up normally, so I'm puzzled.

Thanks,

Paolo

David Forbes

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Dec 27, 2016, 9:38:10 AM12/27/16

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Paolo,

The two anode terminals are there for ease of manufacturing. They are
connected together internally. You may use either one, depending on what
is easier for your board layout.