> The klystron had one major flaw that proved Einstein was right when he > wrote E=MV2.
Hmm... isn't E=MV² the kinetic formula from classical mechanics, whereas Einstein's similarly-sounding formula is E=MC² where speed doesn't enter the picture? > beam. So this beam was moving fast enough that E=MV** manifested itself > because the electron gained mass as you sped it up, and lost mass as you AFAIK in those kinds of circuits, the speed of electrons is not really important: it's only marginally related to the speed of propagation of the signal and the frequency of the signal. Stefan