[Elecraft] Pro Audio PS

[Michael Walker]

Dave

Just about every 'wallcube' switching power supply is auto input voltage
sensing.  This includes Laptops, iPads, and phone chargers.  Even the
Astron switching supplies can handle 110 or 220 although some will have an
internal switch to make that happen.  This is a great feature, but the cost
is switching power supplies can be RF noise if not choked correctly.

You just need a simple and inexpensive plug adapter depending on the
country you go to.

Look at the power supplies you know own and it will show their input range.

Mike va3mw



On Tue, Jul 30, 2019 at 5:42 AM David Wilcox via Elecraft <
elecraft at mailman.qth.net> wrote:

> I also have one of these power supplies and am very happy with it.  Can
> someone please explain how it knows what voltage is input (120 v versus 240
> v) to get the same 12 volts output.  Is there a different power cord?  Am
> sure it needs the correct wall plug adapter. Or is there just a 12 volt
> regulator in the output? Inquiring minds (my old 74 year old one at least)
> want to know.
>
> David J. Wilcox K8WPE’s iPad
>
> > On Jul 29, 2019, at 7:42 PM, JP Douglas <kb1tcd at gmail.com> wrote:
> >
> > Hi all,
> >
> > I have one as well for my KX3, I've even taken it with me on holidays to
> the Caribbean were voltage is 240 volts, still plug and play, works on 120
> or 240 volts. Excellent product though in the shack I run the KX3 on
> battery/solar power.
> >
> > 73 de Jose Douglas KB1TCD
> >
> >
> > Sent from my iPad
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