30 Sep
2024
30 Sep
'24
7:16 p.m.
On 2024-09-30 8:03 p.m., Bob Rosenbloom via cctalk wrote:
Ben, ducking the thrown banana.
On 9/30/2024 6:31 PM, Jon Elson via cctalk wrote:
Why would do something so new?
We all know keypunches back then came with coding forms
and the odd monkey.
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 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