neon glow lamps (was TTL homebrew CPUs)

William Donzelli wdonzelli at
Thu Jul 12 16:17:51 CDT 2007

> You can also look out for tetrode thyratrons - these have an extra electrode
> that can be used to control the trigger point to some extent. The are
> available as heated and cold cathode versions.

These are used extensively in IBM unit record equipment.


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