[Elecraft] KX3 keyline questions

[Steve Zabarnick]

I'm exploring using my KX3 with the QRP-Labs 50W Amplifier. In measuring
the keyline output, I get zero volts to ground when in receive and about
0.5 volts in transmit. When measuring resistance across the keyline I get
about 70 ohms in receive and 5K ohms in transmit.

Isn't the keyline supposed to be open in receive and grounded in transmit?

Steve N9SZ