switching power supplies

[Gary Lee-2]

I have used the alinco dm-330v (think that number is correct).  Has a small
fan at the rear, but in normal use you just cannot hear it over normal room
noise.
Like most switchers it destroys broadcast AM reception, but haven't heard
anything while using the k3 for normal ham use.
it is a 30 amp supply with meters, and adjustable with a detent at 13.8 v.
Also has a switch to set for 13.8 v fixed operation.
binding posts on the rear, with two sets of spring connectors on front and
cigarette lighter connection.
the entire top is a heat sink, but I've never gottten it over fairly warm.


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[Darrell Bellerive-4]

Normal room noise? This is probably what masks fan noise for a lot of
people.

In my house, loud noises are the dust particles crashing into and
settling on surfaces.

I have thrown away analog quartz clocks because the ticking was too
loud. And yes the motor noise in the DVD and VCR players bother me even
when watching a movie at a good volume.

If there is lots of noise in a house, with furnace fans, or air
conditioners, or traffic on the street, then it could mask a the fan
noise from the radio or power supply.

73,
Darrell
VA7TO

On 2010.05.23 10:30 AM, Gary Lee wrote:
> I have used the alinco dm-330v (think that number is correct).  Has a small
> fan at the rear, but in normal use you just cannot hear it over normal room
> noise.

--
Darrell Bellerive
Amateur Radio Station VA7TO
Grand Forks BC Canada
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