On May 29, 8:25*pm, Richard Clark wrote:
Similarly (and tipping my hand about reflected waves), an extra
electron push in the wiring will induce an electron in the tube to
move. *The current is inextricably locked in a dynamic flow. *There is
no new physics in this anywhere.

The only time photons are not generated is during DC steady-state with
no AC signal applied. If you can see the electron beam inside a vacuum
tube (and I have), the electron beam is necessarily emitting photons.
If the field surrounding an electrical current is detectable, the
electrons are emitting photons.
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73, Cecil, w5dxp.com