TTL 7400's Available

[woodelf]

Chuck Guzis wrote:
> This talk of making flip-flops brings to mind a topic not mentioned 
> much at all any more--that of AC-coupled logic.  Does anyone own any 
> CPUs constructed using this logic type?  I realize it was more common 
> when thermionic devices (tubes/valves) were used, but I do recall 
> seeing some transistor and tunnel diode circuits using AC coupling.

I am guessing the orginal DEC logic flip/chips used AC logic.

> Cheers,
> Chuck
>