Marc I do RFI for a living. When I purchased my PowerWerx I made sure it was returnable if I found noise on it. I checked and found everything was well below published specifications so I retained the supply and have very successfully used it in the Sierras where there is virtually no man made noise which makes it sheer joy to operate. This unit was purchased before the model with LED displays was even available.
Back in the days where commercial transmitters had scores of meters it was standard practice to shield those meters so RF would not leak out of the transmitter cabinet. I traced a problem in one HP unit to an unshielded LCD display. I suspect it may be the LED display itself in your PowerWerx that is causing your RFI. Personally I do not see the need of the meters when I can read the voltage on the K3 itself. After all it is the voltage at the K3 that counts. Not the voltage at the power supply. 73, Fred, AE6QL -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of Marc Veenemanno made Sent: Tuesday, June 16, 2015 3:26 AM To: [email protected] Cc: NE9U - Jasper Subject: Re: [Elecraft] k3 switching supply Mine is 6 months old, the version with the LED display, and the moving birdies on 80 and 75 meters are so strong and so annoying that I turn the supply off and operate from batteries if I operate for only an hour or so. I’m sorry I bought the PowerWerx even though it is good looking and a nice size for my small operating desk. Apparently their quality control is a variable, just like my birdies. — Marc W8SDG > On 6/16/2015 1:22 AM, NE9U - Jasper wrote: >> I was about to order a switching supply for portable/dxpedition use and >> thought the one on elecraft site must be a good one, but i see it is getting >> poor reviews on eham.net for RFI/noise generation issues. >> >> anyone have suggestions for a good quiet k3 switching supply? >> >> scott ne9u >> >> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected] ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
