[GreenKeys] Relay suggestions

[Jim Haynes]

On Mon, 24 Jun 2019, John Nagle wrote:
>
> I've used a 1000pf ceramic in series with 100 ohms across the selector
> magnet as a snubber. That gets the spike down to well below
> 400V.  Diodes are not as suitable; they short the selector
> magnet during turn-off, which means current flows longer
> and drop-out time is increased.

Not diodes as just a plain diode across the magnet, but Zener diodes
to limit the spike to what the solid state relay can handle.