[Elecraft] 25A power supply question

[n1abs at comcast.net]

Mike, 

I just picked up a Powerwerx SPS-30DM on the recommendation of a friend after I complained about RF hash from my then-current power supply. I've found it very quiet. The difference between old and new was pretty amazing. 

You might consider the Powerwex supply as well. 

With best regards, 

Pete 
N1ABS 

----- Original Message -----

From: "Mike Dodd" <mike at mdodd.com> 
To: elecraft at mailman.qth.net 
Sent: Friday, November 8, 2013 1:45:26 PM 
Subject: [Elecraft] 25A power supply question 

Hello to the list from a first-time poster. 

I have a KX3, and have a KXPA100 amplifier on order. I see that my 20A 
Tripp-Lite linear power supply isn't sufficient to power both of these, 
so I'm researching other supplies. 

Astron seems to be the gold standard, but I also see some MFJ supplies. 
The 3045MV is a 30A linear supply, and looks good from the specs. Any 
opinions on this one? 

MFJ also has the 4245 45A switching supply, and the DX Engineering 
catalog says, "No RF hash? These power supplies are clean!" 

Are they really clean? I don't want ANY hash spoiling my quiet location, 
and will avoid any switching supply that creates receive noise. Does 
anyone have experience with this line of MFJ switching supplies? 

What about the Astron ASR-SS-30M 30A switching supply. Quiet or noisy? 

Should I even consider a switching supply, or stick with a linear model? 
The Astron ASR-RS-35M looks good, albeit more expensive than the MFJ 3045MV. 

Thanks for any information. 
-- 
73, Mike N4CF 
Louisa County, VA USA 
Elecraft KX3 #3118, 10W 
Carolina Windom up 45' 
http://n4cf.mdodd.com 
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