[simpits-chat] Altimeter Question

Roy Coates roy at flightlab.liv.ac.uk
Tue Nov 4 14:37:32 PST 2003

On Tue, 4 Nov 2003, John Miguez wrote:

> Hee hee, you younglings need an old fart to tell you about TTL.  Except, I am having a senior moment and can't remember what the first "T" means.  The other two letters are Transistor Logic.
> Transistors came out when I was a kid.  They are these tiny replacements for the vacuum tube that helped put a man on the moon.  :)

A vacuum tube put a man on a moon?  why did they use a vacuum? must be the

A thermionic valve might have been useful... better yet, a TTL
(transistor-transistor-logic) device.


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