[Elecraft] [K3] Wetting current and CW paddles

[George Danner]

In radio & TV broadcasting we used "Dry" contacts for microphone switching.
Both relays and switches.
The contacts actually wiped a tiny amount as they made or broke.
Usually the contacts were actually gold plated stiff wires that were
mounted at a right angle.
73
George AI4VZ

A DC wetting current has been common in relay circuits that would
> otherwise just be switching low level alternating current signals. I
> recall seeing it applied to RX front end filter switching relays.
>
> Regards,
>
> Mike VP8NO (G3VUI)
>
>