http://elecraft.85.s1.nabble.com/Silent-power-supply-for-a-K3s-tp7652889p7653001.html
> 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 <
[hidden email]> 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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