On Fri, Apr 15, 2011 at 9:06 AM, Mike Fatchett W0MU <[email protected]> wrote: > 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. >
I use an Astron SS-30M switcher which I have had ZERO issues at 100W on sideband, digital, cw, etc.. I mean zero. Its quiet and very very rarely in a long QSO the fan will turn on (no big deal for me). Well built and easy to carry. 73 -aps (KC2ZSX) ______________________________________________________________ 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
