Hoppy:
    The additional protection diode is on the positive 24v terminal or rail.  Not inside the power supply.
I'll try some blue ceramic HV caps like AG suggested. I suppose that they connect up between the positive and negative rails? I still have not been able to eliminate the unwanted pulsing when the feedback power supply is also connected up.
   

Hoppy I have some Here 16 volt ones shall I poke Nick a couple down the modem to him as it takes six weeks before he gets any thing, but great for bills    PS weather is a bit bad here almost arctic conditions, where is the FE sorry alternative energy ?

Hi Alien,

Yep bit taters here! Emma has poked the beast right up the arse!! A couple of those in series should fit the bill.

I m almost there....  little bit more efficiency to improve..

To the best of our (present-day) knowledge, no special relationship exists between gravity and electromagnetism,
above and beyond the fact that gravity couples universally to everything, and electromagnetism is no exception.

Shortly after general relativity was developed, there have been several attempts to unify these two classical fields,
gravity and electromagnetism, into a single theoretical framework. A few worth mentioning are the five-dimensional spacetime of
Kaluza and Klein; Weyl's attempt to treat the metric and the electromagnetic 4-vector (or, as he called them, the quadratic and linear ground-forms)
on the same footing as describing the fundamental geometry of spacetime; and, last but not least of course,
Einstein's own attempt to derive a unified field theory from a non-symmetric metric tensor, splitting it into a symmetric part (gravity) and a non-symmetric part
(corresponding to the electromagnetic field tensor). None of these attempts were successful.

Meanwhile, particle physicists discovered new particles and new forces, which eventually found their place in the theoretical framework that
we now know as the standard model of particle physics, which integrates three of the four fundamental forces (specifically, it unifies electromagnetism
and the weak nuclear interaction into the non-Abelian gauge theory of the electroweak interaction). Gravity, meanwhile, serves as a background,
which couples to all fields universally and minimally, but without singling out any specific component of the standard model, be it electromagnetism or something else.

This of course is not the final word, since the relationship between the (classical) theory of gravity and the standard model's (quantum) theory
 of fields is uneasy at best. If/when an improved theory is found that treats gravity and other fields on the same foundations, perhaps there will be
 new relationships uncovered. But that's speculation. What I described above is what we presently know.