Let's say I have a 3-500z which wants 5 volts at 15
amps for the heater.
The spec doesn't say AC or DC -- and according to Ohm,
(given that one is 60 Hz and the other is zero Hz into
what is essentially a resistive load on the other side
of a BIG choke) it doesn't matter.
Watts is Watts.
I have a 5 volt, DC, 20 amp, industrial-grade
switching supply. It cost $2 and weighs about 3 lbs.
Power-factor-corrected, auto-ranging 90-255VAC input.
What do you say I use the switcher, instead of the
$58, 22 lb. transformer that would provide the same V
and I ... with poorer regulation, etc. ?
Before someone says something about switchers and RF
noise, etc., I checked this one under load and it
doesn't put out anything I could hear. It also
provides about 4500v isolation to the AC input, and it
didn't flinch when I subjected it to a strong RF field
at 14 and 28 MHz.
What's wrong with this picture? Why aren't more
people going this route when building?
Steve KZ1X/4 ...
... who is also looking pretty seriously at that HV
switcher from Watts Unlimited
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