30 Sep
2024
30 Sep
'24
7:03 p.m.
On 9/30/2024 6:31 PM, Jon Elson via cctalk wrote:
On 9/30/24 16:23, Paul Koning via cctalk wrote:
Now that's an actual antique computer application, though I'm surprised
they didn't use a solid state implementation.
Bob
--
Vintage computers and electronics
www.dvq.com
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One application for devices like that would be
vacuum tube power
amplifiers, to delay the high voltage power supply until after the
heater current has been on for a bit.
paul
> On Sep 30, 2024, at 5:21 PM, Van Snyder via cctalk
> <cctalk(a)classiccmp.org> wrote:
>
>
> I have two SPST time delay 12-volt relays packaged like vacuum tubes
> with octal bases, Amperite models 12N010 (ten seconds) and 12C5 (five
> seconds).
>
Another place they were used (but I think 60 second delay) was in the
IBM 2314 disk system, where these delayed loading the heads until the
drive had been spinning for 60 seconds or so.
Jon