Art Unwin wrote:
I think I have to take a bash at the term equilibrium since it apears
to be latin this side of the pond.
Equilibrium means balance using a minimumn of words. If there was not
balance then there would be movement.
Scientists revert to an arbitrary field where the outside forces equal
the inside forces as in Gauss's law of statics.
If movement is to be considered then the field will be termed dynamic.
Adding a time varying field and radiators to the static field
it is then the same format as Maxwells laws ie. derivative mathematics
of one is exactly the same as the other i.e. they are the same thing

If you look at a sinosoidal curve you have balance between the stating
point and another point that is repeatable.
With a pendulum it is two swings ,forward and backwards which is then
repeatable. In the case of a radiator the length of one point to a
similar point
that is repeatable is a point of equilibrium. True the curve crosses
zero at the half way point but the areas enclosed either side of the
half way point
are not in repeatable terms unless the curve does not cross the zero
point that is resonant but not in equilibrium. When it gets to the
point of repeatebility
or at the end of a period a term used in frequency then that point is
both in equilibrium and resonant.
As an aside when changing from a static field to a dynamic field the
term equilibrium still holds which leads to the term
A radiator can be any shape, form or elevation as long as it is in
equilibrium. This rules out the idea that a radiator must be straight
and planar.
I think I have said to much Nuf said class dismissed.
Art Unwin KB9MZ....xg
So guys look at the intent of what I am saying without crusifying the
terminology.

Amazing. So many words, so little information pertaining to the
subject. And meanwhile smoothly changing the focus while still saying
nothing. He really is awesome.

tom
K0TAR