So, if you start off at, say, 9AM in the morning, how long is it before you
have checked that every circuit stage of your Japanese rice box is working
correctly, and that the combination of all such sub circuits is working as
it should be, in terms of measurable power output and frequency accuracy,
both at the fundamental and that all the significant harmonics are
sufficiently low?

(This, of course can only be done once that you have gone through a
similar process for your test equipment)

(This aspect of amateur radio does not apply to those with licences little
removed from CB radio, the Fools' and Idiots' here in Brit, and the
inappropriately-named
"Technician" over in Yank)