>... P3 Elecraft could provide an internal 1 kw dummy load.
Or maybe a colour-coordinated brick? ('color' for US readers)
I'd tend to put the P3 on the left, so it would be in front of my face
while I tuned the K3 with my right hand. For those of you yet to experience
a spectral display, I think you'll find that you watch it more than the
frequency display.
VE7XF