I have been running my K3's on a Samlex SEC 1223's for quite some time . I have never had any issues with fan noise or switching noise.
I just purchased a Powerwerx SS-30DV. While someone said that Powerwerx has said that you could turn up the voltage, I submitted a ticket asking for the information to do this and they responded that this was not an option. I bought it for our upcoming trip to J6 for the size and extra current capability. I like the binding post on the back and the powerpole connectors on the front. I have an Astron switching supply that would shut down on 20m from what I can only suspect is rf yet non of the other switchers have done this. On 4/14/2011 9:40 PM, Doug Person wrote: > Samlex are not reliable? They are sold re-labled by Kenwood. My two > have been around for 2 decades, in constant use nearly every day. They > power everything in my shack. If you look hard enough, you can find > people with complaints about everything ever manufactured. I guess if > my Samlex failed, I would just fix it. They aren't really that > complicated. The Powerex is well made, but I don't find the fan to be > that bad. The smaller the supply the more critical it is to cool. The > Powerex fan is just above the background noise. The bottom line is that > nothing is 100% reliable. Even stuff installed on spacecraft. > > Doug -- K0DXV > > On 4/14/2011 8:40 PM, [email protected] wrote: >> I use two 100 amp supplies here that are made by Walt Williams W5YUO They >> are >> quiet and bullet proof, but if you want one you will have to come to Texas, >> as >> he only sells local and only makes them on order. >> >> They are very heavy, so shipping would be a problem... >> >> Tom >> N5GE >> >> On Wed, 13 Apr 2011 16:51:03 -0700 (PDT), VK5ABQ<[email protected]> wrote: >> >>> Thank you for all your replies but I've found negative comments about most >>> (the power supplies that is.... >>> boom boom) >>> >>> I found the following complaints/restrictions - >>> Powerwerx : noisy fan >>> Diamond 3000: poor reliability on later models >>> Astron: Linear's are only suitable for 110VAC not 240. Some complain about >>> fan noise and interference on their switchers. >>> Samlex: poor reliability >>> Barrett: $700. >>> Kenwood: generates electrical interference on 80 and 160m. >>> >>> XP Power's CCM250 (sold by Amtex, >>> http://www.amtex.com.au/power_pdf/CCM250.pdf) still looks interesting as it >>> is convection cooled, weighs 780g and is very small. The 15V model can be >>> trimmed down to 14.55V but I this may still be too high? Also only rated for >>> 16A continuous and 20A peak. Cost is $380 and lead time 7 weeks. Yes, >>> interest has diminished. >>> >>> Conclusion: I'll put off buying the K3/100 for now until I can bothered to >>> have another look for an electrically and audibly quiet 20A power supply >>> suitable for 240V. >> ______________________________________________________________ >> 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 >> > ______________________________________________________________ > 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 ______________________________________________________________ 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
