[Elecraft] KPA500 / KAT500 and W2 watt meter question

[Andy Durbin]

SteppIR will accept up to 200 W without damage and opening the amplifier key line is the standard way protect SteppIR antennas.

It has been asserted that "NO key line interrupter is needed".  However, Elecraft recognizes that they may be such a need and sells an adapter to disable keying by AUX cable.  The description even mentions including the W2 is the protection system.

https://ftp.elecraft.com/KPA/Manuals%20Downloads/E740160%20-%20KPAK3AUX%20Cable%20Set%20Instructions%20Rev%201E.pdf

Andy, k3wyc