TTL 7400's Available

[dwight elvey]

>From: "William Donzelli" <wdonzelli at gmail.com>
>
>>There was at least one production parametron-based computer:
>
>I have a Japanese parametron logic trainer. I think there are 12
>parametrons in it, so it is not too useful.
>
>I think parametrons died out fast because all other logic forms were
>much easier to implement as speeds increased. Once the things get up
>into the MHz region, tuning and phase shifting became real issues.
>Nobody wants to tune logic - leave that to the radio guys.
>
>--
>Will

Hi Will
Ok, tell us more about these things. A web search tells little. All I
see is something about non-linear magnetic core, f/2 and phase.
I don't see how it is used to create a logical operation.
Dwight

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