Richard Clark wrote:
There are both wave descriptions of this process, and lumped circuit
equivalents. Both work, and both describe the same process from
different points of view. One does not negate the other's validity

I agree with that last statement - and we can take it a step further.

Each description can do things that the other one can't; no argument
about that. But in cases where both descriptions should be valid, then
they *must* agree.

This is a basic cross-check that should always be applied... but
regrettably isn't.


--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.co.uk/g3sek