A typical use for those would be either to delay applying plate voltage to a
high power amplifier tube until after the filament current has been on for a
bit, or to cut out a series resistor used to limit the inrush current on a
capacitor-input power supply. The delay (especially the 5 seconds) seems to
fit the second application best.
paul
> On Feb 22, 2025, at 8:08 PM, Van Snyder via cctalk <cctalk@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).
>
> They're in their original boxes.
>
> I have no idea what devices used them.
>
> It seems a shame to throw them in a recycle bin.
>
> Does anybody want them?
>
> Van Snyder
>
>
