A lot depends on how you plan to operate. I have a Gamma Research HPS-1a http://www.gammaresearch.net/ that is ideal to take with me for portable operation for CW and SSB. It handles a 100 watt transceiver on these modes fine, but would not handle RTTY at full power or very slow CW. It's tiny and light. It's a switcher, with a 5 FARAD output capacitor. It's quite popular and there's a bit of a waiting list now.
Perhaps a smart battery charger for your batteries would be a good choice for you. Try http://a-aengineering.com/QST_58.pdf This has the advantage of emergency capability if the power is off. I choose not to have big batteries in my house, but I'm guessing a sealed battery would be safe enough. My K2 has an internal battery, and I'm using a smaller version of this smart charger to keep its battery charged. You can choose a small switching supply like one of the Samlex or Alinco or Astron offerings. The Alinco DM-330MV has many fans. I plan two K3s for SO2R contesting. I use an Astron 70 amp linear supply and an 80A West Mountain Engineering power pole distribution panel and all the 12V devices in my shack (antenna switching, SO2R controller, power meters) connect to it via Anderson Power Pole connectors. I don't need this much current capacity, but everything runs well under its designed capability. Some switching supplies are noisier than others, so if you're considering a switcher, look over the reviews carefully. The K3 is quiet enough that you'll hear everything. Many high-end rigs have built-in switching power supplies. If the switcher is built for communications use it has a chance of being reasonably quiet. But you won't keep a noisy switcher very long. Pay the money for a good one. 73 de Dick, K6KR -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Thom LaCosta Sent: Tuesday, January 15, 2008 3:31 PM To: [email protected] Subject: [Elecraft] K3 Power Supply Looking for suggestions for a power supply for the K3/100 The only thing I have handy(well, if I can get them upstairs) are some sealed lead acid batteries from motorized carts. I have a few that are 34ah and at least one that is 55ah and one of the chargers that autosenses battery charge level. Seems to me this should do the job, but I've never run a 100 watt rig on batteries, so I really don;t know. thanks in advance for suggestions. 73, Thom k3hrn _______________________________________________ Elecraft mailing list Post to: [email protected] 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: [email protected] 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
