[time-nuts] 5070B once more.... (actually 5370A fans)

Rick Karlquist richard at karlquist.com
Thu May 21 20:39:07 UTC 2009


Hal Murray wrote:
> How much ECL is used in a 5070?

A bunch

How tightly are they packed?

You need a high cooling velocity even if just one chip.

> How much of
> the heat goes directly from the chip to the air rather than from chip to
> board to air?

A substantial amount of cooling is from DIP to air, unlike tiny
SMT packages used now.

> How much room is there above the chips?  Many years ago I saw some neat

Probably not much extra room.

Rick Karlquist N6RK




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