K3 Power Supply

[Edwin Johnson]

Hello Phil,

On Sun, 23 May 2010, [hidden email] wrote:

> From: "Phil LaMarche" <[hidden email]>
> Subject: [Elecraft] K3 Power Supply
>
> I have a 35 and 70 amp Astron PS for home use.  I want to buy a supply that
> is light and nice for taking it on vacations etc.  Any recommendations?
>
> Phil

For several years I have been using an MFJ-4125 (6"x6"x2") with several
different rigs when portable. Fan noise is quite low, especially when you have
if off the same table as the rig, which is how I operate it. At the time I
bought it, several years ago, it had one of the best reviews of several
covered in QST for having no hash nor ripple. There is a more current review
in QST with other supplies having a few more features, but this unit is light
weight and very dependable.

...Edwin
____________________________________________________________
"Once you have flown, you will walk the earth with your eyes
turned skyward, for there you have been, there you long to
return."-da Vinci http://bellsouthpwp2.net/e/d/edwinljohnson
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[Alan Bloom]

For those bothered by fan noise, you might look into my fan speed
controller article in February QST (p 44).  It's a very simple circuit
that gradually speeds up the fan as the temperature rises.  PC boards
are available from FAR circuits or you can just breadboard it on a scrap
of perf board.

It was designed for the MFJ-4125 but should work with minor modification
with any power supply that uses a 12V fan.

Al N1AL


On Sun, 2010-05-23 at 13:57 -0500, Edwin Johnson wrote:

> Hello Phil,
>
> On Sun, 23 May 2010, [hidden email] wrote:
>
> > From: "Phil LaMarche" <[hidden email]>
> > Subject: [Elecraft] K3 Power Supply
> >
> > I have a 35 and 70 amp Astron PS for home use.  I want to buy a supply that
> > is light and nice for taking it on vacations etc.  Any recommendations?
> >
> > Phil
>
> For several years I have been using an MFJ-4125 (6"x6"x2") with several
> different rigs when portable. Fan noise is quite low, especially when you have
> if off the same table as the rig, which is how I operate it. At the time I
> bought it, several years ago, it had one of the best reviews of several
> covered in QST for having no hash nor ripple. There is a more current review
> in QST with other supplies having a few more features, but this unit is light
> weight and very dependable.
>
> ...Edwin
> ____________________________________________________________
> "Once you have flown, you will walk the earth with your eyes
> turned skyward, for there you have been, there you long to
> return."-da Vinci http://bellsouthpwp2.net/e/d/edwinljohnson
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

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