[Elecraft] TX power drifts upwards.

[reliant325 at talktalk.net]

I recently acquired a K3 which I decided to try on WSPR.
I have been active on WSPR for many months now. I setup the K3 with the same interface and PC as I use with my IC7700.
The setup with the K3 was straightforward and worked well.....however.....

I set my TX power to 1 watt and during the TX cycle the power slowly creeps up to about 2 watts.
When the next TX cycle comes around, its back to 1 watt and then creeps upward again.
Anyone else experienced this?

Roger G0IUW