[Amps] Actuating a 120 VDC relay with low voltage

[Alek Petkovic]

Yep. They are DC.

On 27/12/2022 9:07 am, Paul Christensen wrote:
>> "OPTO-22 electronic relay.  You can't get much simpler than that."
> If going that route, ensure it's a DC-load solid-state relay -- not the more
> common AC SSR type that typically depends on a zero-crossing.  Last time I
> checked, the PT-2500A amp has a -110 VDC amp key line.
>
> Steve, also consider the Keyall device:  http://wb9kzy.com/keyallhv.htm
> Easy to build, easy to install, and it doesn't care about load polarity: it
> works with positive, negative, and AC amp key lines.
>   
> Paul, W9AC
>