>Linear 0-300V has some special challenges.. It is not as straightforward for a lab supply.
why ?
the 0-30 is made using 4 taps in a transformator, and relays, then a linear regulator.
lets do the same
0-300V again in 4 taps. and again a linear,
remember i request x10 voltage, and 1/10 the current = same watt out
and of course this will be same watt lost in the heat sink,
this way all mecanical desigs can be reused.
NPN transistors or fets exist that handle this voltage, no problem at all.
i really want a linear type, since I want to know all the noise i see is comming from the DUT / own designs.
if this is too hard. I could accept 2 individual (like the 2 x 30V is actually)
0-160V but lets then ask for 0.6A each = same watts as the original design.
then I just end using them in series mode, not parallel (i prefered to parallel hi voltage gear, not series)
why do I need this :
working with small-size AC/DC supplies is a nightmare, getting accurate, input voltage, current, and watts in high resolution
of the AC input, and to be able to measure on it, is just a pain,
but they work just as good on DC input, now it is isolated and current limited, much more safe, and much easier to work with.
at the moment i do use isolated AC/AC and then a variable transformator, then rectifier, and different size fuses,
the voltage is quite stable and I can get my job done, but the setup is looking like a terrible mess,
I prefer a regulated, and current limited supply, with live watt readout in good stable high resolution like my two SPD3303X units got.
so I need like 5 units in series to make the 300 V DC I need, it will take up too much desk space and cost a fortune,
it could be really nice with a unit exactly SAME size. get my point ? or am i compleetly off ??