Yep:
That's where I'm kinda leaning toward a linear. No more power than I need
(14VA)
a conventional supply will be cheaper and a lot less headache.



"Bret Ludwig" wrote in message
ps.com...

wrote:
Hi group:

Has anyone in the group found a switcher good enough for high voltage
(180
VDC), low current (.010 amps)
audio use. When I say good enough, I'm referring to noise and EMI. I've
been
looking at LT, National and power integrations
but haven't found anything yet. I also need 12V @1.0 amp for filaments.
Any ideas appreciated.



Commercial brick supplies can be used for tube HT and filament power
but considerable attention has to be paid to shielding and filtering.
The entire unit would need to be in a well secured shielded can and
power brought out through feedthru caps.

Even at today's low prices, a conventional power transformer and
rectifiers and filter caps are cheaper.