Hi Thomas, I'm not sure what your operating style is but if you are looking for 100w on CW and SSB then I recommend the Gamma Research HPS-1a. I have one and run my K3-100 with it all the time in a portable fashion. Here is a link to Fred's site: http://www.gammaresearch.net/
It has a very small footprint, weighs only 1.25 lbs and has no problem supplying my K3 @ 100w for CW. Fred recommends cutting back to 25 or 30 watts for continuous key down type ops. I've read others who state they run it at 40 watts for PSK ops without problems. Some reviewers commented on the fan and some excessive noise, but I've never been bothered by it at all. It is indeed not as quiet as the K3 fans, but certainly not loud IMO. I've heard no noise or hash on the K3 either. I made a short cable that plugs into the HPS-1a connector (supplied) to APP's to fit the K3. If you're looking for a linear replacement, this may not meet your needs. But for portable or just CW & SSB ops it certainly has worked fine for me. Take care & 73, Dave W8FGU > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:elecraft- > [EMAIL PROTECTED] On Behalf Of Thomas Kuehl > Sent: Monday, July 07, 2008 5:24 PM > To: elecraft@mailman.qth.net > Subject: [Elecraft] Switching supplies and the K3 > > Hi, > > I am back on the Elecraft list after being gone for quite a while. I have > a K3/100 coming in the next month or 2, and now I am thinking about how it > is best to power it. The K3 has a nice small footprint and that will be > much welcomed in my small operating area. And, I don't want to dwarf the > available space with a big linear power supply. Therefore, I am > considering a switching power supply with its small size as well. > Switching supplies have come a long way relative to the RF hash generation > issue and I am considering going that route. I sure don't want to degrade > the K3'3 outstanding performance with a noisy supply, so I am still > cautious. > > The eHam reviews for switching supplies provides a lot of different > opinions for the various products. One in particular, the Jetstream > JTPS28, seems to get high marks from its users. Is anyone on the list > using this particular supply to power the K3? If so, what are your > impressions of its performance? Or should I skip the switching power > supply idea altogether? > > Thanks, Thomas - AC7A > > > > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
