Testing Power Supplies! Re: Norsk Data Nord-10/S restoration effort on the way!

[William Donzelli]

> TTL is getting hard to find, especially the more obscure types such as
> 74S series.  (And if the book says they want 74S, it's quite possible
> no other variant will work...)

I do not think 74S is very hard to find (apart from the unprogrammed
PROMS, I suppose). Some of the 74L and 74H chips are getting difficult to
find, but these are the chips that never were popular (like the expanders
and AOI gates).

As a side note - does anyone know a source for ECL PALs (10K preferred
over 100K)? They were never popular either.

William Donzelli
aw288 at osfn.org