[VHFcontesting] Switching Power Supplies (opinions)

[KA6AMD]

I'm using the MFJ switcher.  I decided to get it after looking at the noise 
specs in a QST review.  After a couple of months the switching transistors 
died.  I sent it back to MFJ where they replaced them under warranty. 
However as part of the repair, they wired the fan on continuous.  So the 
power supply is quite a bit noisier than it used to be.  Works fine with a 
rig and brick, even in the EME modes.

Erich
KA6AMD

----- Original Message ----- 
From: "John Geiger" <johngeig at yahoo.com>
To: "Rusty Boling" <ae4bk at yahoo.com>; <vhfcontesting at contesting.com>
Sent: Saturday, September 25, 2004 10:51 AM
Subject: Re: [VHFcontesting] Switching Power Supplies (opinions)


> Hi Rusty,
>
> I had a Diamond switcher for a little while, and it is
> a pretty nice supply, especially with the cigarette
> lighter adaptor and front binding posts, which come in
> handy for accessories.  The best for price and space
> would be the Astron SS30, which I had for several
> years, and never had a bit of trouble with it.  It is
> rated at 25 amps continuous and 30 amps intermittent,
> so your Mirage and Icom should do OK on it for SSB or
> CW.  Might put it a little hard if you are doing WSJT
> or FM with it.  It is a good deal smaller than the MFJ
> or Diamond, but then you don't get meters, Adjustable
> voltage (never used that anyway), or multiple outputs
> on it.  You get 1 set of binding posts and that it is.
> I am currently using a Samlex which is also nice, but
> not enough power for you, and I will probably be
> trading it for something with a little higher current
> soon to get back into WSJT myself.
>
> Good luck on your decision.
>
> 73s JOhn NE0P
>
> --- Rusty Boling <ae4bk at yahoo.com> wrote:
>
>> Anyone out there running a switching supply with a
>> 160W brick and a rig on the same supply?  Have been
>> running an IC-271A (20W) and a Mirage B1016 (160W)
>> for about 8 years now and my 35A Pyramid supply has
>> finally died.  The amp and rig never pushed the PS
>> all the way.  I have read review after review on
>> different PS's on www.eham.net and still can't
>> decide what I need to do exactly.  Seems there are
>> so many variations in reviews.  Just trying to see
>> if any of you are running a switcher and if you are
>> having any problems at all.  Right now just for the
>> reason of the "no matter what warranty", multiple
>> terminals, and a good local dealer I am leaning
>> towards the 40A MFJ.  The Diamond 40A looks ok, the
>> Diawa has good reports but only 1 set of binding
>> posts and is 30A, and then there is the Astron which
>> is 25A too.  I don't know that the Astron has quite
>> strong enough.  I think my amp and rig together pull
>> about 27A an that is not counting any other
>> accessories.  Any good reports
>>   on any
>>  of the supplies mentioned?  Don't get me wrong, I
>> like the regular old regulated supplies with large
>> transformers just like the Pyramid that I have but I
>> could use some more deskspace and something lighter
>> for mountain-topping since my old supply finally
>> gave up the ghost anyway.  Rusty Boling  NE4ME
>> formerly AE4BK
>>
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