[Elecraft] panadapter "noise" without antenna connected

[jsdroyster at nc.rr.com]

Thanks to Guy and top Wayne for their comments.

I was not clear in my question:  The unit is a P3, not a PX3.

The vertical columns of noise are present with or without the antenna connected.

As they change from one time to another, I do not think they are internal noise.
I see in the issue of QST that just arrived there is a RF interference article which I am now reading...

Thanks for these and any more helpful comments!
Julie KT4JR