[Elecraft] K3 - Key Out Question

[Iain MacDonnell - N6ML]

On Sun, Dec 20, 2009 at 5:55 PM, Jack Nelson <jack.nelson at mindspring.com> wrote:
> Good evening. I'm attempting to use my K3 with a Tokyo High Power HL-1.2Kfx
> amp. On the amp, when STBY (which has 12v on it) is grounded, the relay
> clicks, and the "On Air" led lights....just like it should. However, when a
> cable is connected between the K3's Key Out jack, and the STBY on the amp,
> the amp shuts down with an "Over Drive" warning as soon as the K3 is keyed.
> The K3's power is passed through the amp to the watt meter and dummy load.
>
> I noticed the Key Out jack on the K3 has 4.75vdc on it whether it's in the
> Tune position or not. Is this normal. I don't think the amp likes seeing the
> voltage from the K3.

Are you sure you're not just putting too much RF into that THP? Dial
the "PWR" setting way down on the K3 and try again ...

    ~Iain / N6ML