John
Thanks for the ideas.
The original receiver has one regular PSU outputing the voltages mentioned.
I'm going to reconstruct the rx by having three modules, rf, if and af. I'm
trying to get the whole rx into a 6U 19" rack cabinet, but it's tight for
space, and that's why I think of getting rid of the original PSU that has
quite a large transformer. I'm faced with a choice of either using one PSU
to power everything, or to put a PSU on each module. I kinda like that idea
for various reasons but it's not essential by any means, and might still go
for the one PSU solution.
I think what you are saying is wind 4 seperate secondaries and treat each
one as a seperate PSU in it's own right. But don't regulate each secondary
seperately.
Anyway, I think a key point here is the notion of winding ones own
transformer. This is a must. So, I've got to find a transformer supplier and
a circuit. Maybe if I look around I might come across some low-voltage
circuits and it's simply a matter of just upgrading the component voltages.
I think then task is to find a low-voltage circuit, then more-or-less copy
that design, but replicate the secondary circuit for as many secondary
windings that I have.
For instance:
http://www.coilws.com/Switch Mode Power/5W_SMPS.htm
This particular circuit is not regulated, but I think were saying that if I
were as an example to use this circuit I could stick to the circuit
arrangement except for component voltages in the secondary circuit, and I'd
have 4 rectified secondary circuits instead of one. Which I would join in
series.
Of course I must calculate the needed power output of the desired PSU. And
I'd have to figure out how to regulate.