[Elecraft] KX3 keyline questions

[Steve Zabarnick]

I'm pretty sure that I am measuring the ring to ground for ACC2. The amp is
not connected. Is there a menu setting I could have wrong? If not is the
keyline output transistor bad? How do I diagnose the problem in the KX3?

Steve N9SZ

Steve,

Are you sure you're looking at the ACC2 ring contact? Ring is KEY OUT;
tip is GPIO, a \
logic signal configurable in the ACC2 IO Menu entry.

Wayne
N6KR


On Sat, Nov 21, 2020 at 4:12 PM Steve Zabarnick <zabarnick at gmail.com> wrote:

> 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
>