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Vacuum Tube Clock

alfa88

Dec 1, 2010
349
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Dec 1, 2010
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1st off I tried searching the forum but it didn't seem to work. I tried a google search and found plenty of Nixie clocks. Nixies are not vacuum tubes! Anyhow, I was contemplating maybe building a Nixie clock but instead of ICs or even discrete transistors using vacuum tubes. Has anyone ever attempted this or have some info?
 

AnalogKid

Jun 10, 2015
2,688
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Jun 10, 2015
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You can get one binary flipflop out of a dual triode. A four digit (hours and minutes) clock needs a minimum of 13 flipflops, plus more tubes for carry-gating, plus more tubes for some kind of time-setting capability, plus more tubes for display decoding.

People have built digital clocks using nothing but opamps (no digital IC's) and nothing but transistors (no IC's or any kind), so I wouldn't be surprised if someone already has done this with jars.

ak
 

alfa88

Dec 1, 2010
349
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Dec 1, 2010
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349

alfa88

Dec 1, 2010
349
Joined
Dec 1, 2010
Messages
349
I ordered up some Dekatrons but I don't know how successful I'll be as they're coming from Ukraine. Making one flip flop from vacuum tubes is one thing but an entire clock string is way out of my budget.
 

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