I'd like to second Don's comments. Often the difference between a noisy power supply and a quiet one is the separation of only a few feet. The idea place for the supply is on the floor away from the receiver and freeing desktop space. I have mine paralleled with a storage battery too. That saves the QSO when the power fails (assuming I can operate in the dark). Don mentioned certifications for each country. Don't forget the power source is often different from country to country (50/60 hertz and 120/240 vac) or even within the country (look at Japan). Building a supply that meets all these requirements adds expense. Look at the issues an internal power supply causes in the KPA500 even without the concerns of interfering with a receiver. 73, Fred, AE6QL
-----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: Tuesday, September 18, 2012 1:44 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K-Line Addition - DC Power Supply (Suggestion) In my opinion, power supplies should be relegated to something like the AC receptacle on the wall or the 12 volt battery under the hood of an automobile. It should do its thing, but not be obvious. IMHO the place for a power supply is on the floor under the operating desk (or workbench). No need for meters on the supply itself, I have measurement stuff above the tabletop. I use an Astron 35 linear at the operating position and have an Astron SS-30 switcher at the workbench (along with several other lower current supplies). There are no 13.8 volt power supplies above the desktop - If I need other voltages, yes, I do have a +/- 15 volt supply along with +5V on the workbench along with a variable voltage positive supply for special needs - but I don't think those are relevant for powering the K2, K3, or KX3. Bottom line, power supplies are on the floor out of the way and treated just as an energy source. So, my answer to your question is NO. The RigRunner does sit on the desktop with fuses to match the wire sizes exiting from it. I do not think it is in the best interests of Elecraft to attempt a power supply design given that it would require UL compliance certification (as well as other countries certification) which can be an expensive process for a power supply that would likely have a volume of less than 10,000 units even at product life end. I would put this in the "it would be nice -- but" bucket. 73, Don W3FPR On 9/18/2012 10:27 AM, rich kennedy wrote: > How do Elecraft users feel about the possible addition of a > high-quality DC power supply that matches both the physical dimensions > and veneer of the existing K-Line? The power supply could even be > sized to set above/below the new KAT500 and should, IMHO, have > multiple DC outlets such as Powerpoles® and screw lugs. I’d be > willing to pay a premium for a quiet DC power supply with very low > emission characteristics. Thanks, 73, Rich, K3VAT > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
