[Elecraft] Silent power supply for a K3s

[Bayard Coolidge, N1HO]

 I've been running an Astron RS-35A for several years now, fortunately withoutany buzzing. However, I use it to feed a WMR PG40S, which keeps a large (105Ah)AGM SLA battery charged, and that feeds a RigRunner. I adjusted the RS-35A to14.1 V on the RigRunner (on receive), and it dips to 13.5 or so on transmitwhen running the K3 at 100W out.
As others have mentioned, it is a case of using large wire - #10 or #8 - in the shortestlengths possible, and the heavier-rated APPs throughout.
There are numerous articles out on the web and in the archives of this mailing list aboutamendments to Astron power supplies and depending on the age of yours, you may needto investigate what the root cause of the buzzing is, be it simply loose fastening hardwareor perhaps a filter capacitor that's well past its prime.
HTH,
Brandy, N1HO 
    On Sunday, June 9, 2019, 10:54:23 AM EDT, Peter Dougherty <lists at w2irt.net> wrote:  
 
 Hi all,
I would like to find a power supply to power the K3s that is completely
silent. I've owned an Astron RS-35M, which was great until it started
buzzing like crazy.