[Elecraft] RFI on K3s

[Drew AF2Z]

I do also have multiple turns of the p/s power cord wound through a 
large toroid, just for good measure. I investigated the Powerwerx at one 
time when I was having some RFI problems, comparing it side by side with 
a linear supply, and just didn't find the ss-30dv to be a problem. My 
main problem was the DSL modem, and perhaps copper phone lines, now 
eliminated by Fios internet.

73,
Drew
AF2Z



On 06/20/16 07:59, Marc Veeneman wrote:
> My PowerWerx supply DOES generate those drifting noise spikes, ruining CW on 80 meters for me.  I have yet to find a 13.8 volt switching supply that can provide 25 quiet amps.  I've gone entirely to batteries rather than use quiet but inefficient linear supplies.
>
>   Now I only have SMPS noise when recharging the batteries.  So I leave that for non-hamming hours.  More testing is needed, but I did find one SMPS for LiFePO4 batteries that seemed RFI free.  It's an Optimate brand product but only produces 5 amps.