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Old 01-09-2017, 05:52 PM
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Nemo288 Nemo288 is offline
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Join Date: Jan 2011
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Wow, that's some primitive kit.
Early transistor logic likely.
Before the flat panel plasma, cold florescent, liquid crystal, and LED displays there were no good solid state numeric outputs.
I have a Korean War frequency counter (that goes with a military shortwave radio) that uses nixie tubes for the numbers.
That unit weighs 50 pounds and comes in a bigger box with spares etc.
The whole thing is large enough to use as a coffee table.
I have a later freq counter that has solid state innards but also uses nixie tubes for the readout.
Nixie tubes use a neon type readout where the "filaments" are shaped like numbers and there are 10 of them in each envelope.
Kinda neat to watch them operate but they take around 100 volts and some associated high voltage electronics to work.
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Last edited by Nemo288; 01-09-2017 at 05:55 PM.
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