re[Elecraft] .: Switching Supplies

[Alan Bloom]

On Tue, 2008-07-08 at 17:02, ab2tc wrote:
> Hello all,
> 
> I am using the MFJ-4125 25A switcher with my K3. I have no RF hash or
> birdies from the power supply at all. I find it unbelievable that popular
> and supposedly quality power supplies like the Astron would leave exposed
> transistor cases at elevated voltage above ground. The MFJ fan, which is
> always running, isn't whisper quiet, but not really noisy either. This
> switcher faired very well in the ARRL review a few years back, in fact it
> was one of the most quiet ones tested.
> 
> Knut - AB2TC

And the cheapest of all the ones tested, as I recall.

I bought it because of the price and the small size and weight.  When I
go on a trip I can throw it in a suitcase with the K3 and still have
room left over for clothes.

The only complaint I have heard about the MFJ-4125 is the fan noise. 
While it is definitely audible, I personally don't find it
objectionable.  For those who do, placing the unit under the operating
table should solve the problem.

Al N1AL