[Elecraft] Silent power supply for a K3s

[donovanf at starpower.net]

I have twelve RS-35M power supplies and all are completely quiet. 

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

From: "Alan Corbeth" <acorbeth at gmail.com> 
To: "Bill" <w2blc at nycap.rr.com> 
Cc: "Elecraft International Group" <elecraft at mailman.qth.net> 
Sent: Tuesday, June 11, 2019 12:04:02 AM 
Subject: Re: [Elecraft] Silent power supply for a K3s 

I have an Astron RS35 power Supply purchased in 1991. There was a period where I didn’t use it for ten years. Now it’s in use daily and so far it continues to be totally quiet. 

Alan 
K7FH 

> On Jun 10, 2019, at 3:56 AM, Bill <w2blc at nycap.rr.com> wrote: 
> 
> I have several Power Werx switchers and prefer them for their size over the heavy analog supplies. Fans are not a problem (actually, I hear nothing from them at all) - IF you design your radio desk for proper equipment placement. Place the power supply at your right hand - and you WILL hear noise, XFMR, fan, etc. 
> 
> It is amazing what proper station design/construction can do for making silence. Open faced metal shelving and bare desktops don't cut it. 
> 
> Just for grins, I put one of those Nanoxia fans in my IC-7300 and silenced it completely. Worth the few dollars and effort. No temperature changes noted. Hmmm - KPA500????? 
> 
> 
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