Bob, Not sure why you'd need a boost regulator. The K3 is one of the very few HF transceivers that specifies it will work fine down to 11v. I've used mine for years from a 12v SLA with no problems at all. Use 100AH SLA(wheelchair battery) at home (use Powergate to charge/control voltage), so most of the time K3 supply is sitting at 13.8v. However, I often unplug AC when storms are near. I often forget to plug AC back in and the K3 runs on 12v for weeks of daily nets before I notice low input voltage. (Couple of hours a day at 100 watts tx, SSB). When camping with Boy Scouts, I usually use a 26AH SLA. Never had a problem with that either. However, I usually run around 40 watts power to help conserve energy. That's usually just a weekend. If you want to be able to run another brand transceiver from battery power, then, yes, you do need the boost regulator. Elecraft rocks! Oscar, WB5GCX
On Thu, Aug 9, 2012 at 11:18 AM, Matthew Zilmer <mzil...@magellangps.com>wrote: > http://stores.tgelectronics.org/Detail.bok?no=10 works quite well. I > have two 50W Seimens PV modules feeding a charge controller, then to an > Optima 75AH AGM. The Optima is the shack supply. > > Matt Zilmer > Consultant - Product Management Dept. > Magellan Navigation / MiTAC Digital Corp. > Tel: (909) 394-6052 > Cell: (909) 730-6552 > Si fractum non sit, noli id reficere > > > -----Original Message----- > From: elecraft-boun...@mailman.qth.net [mailto: > elecraft-boun...@mailman.qth.net] On Behalf Of Bob > Sent: Thursday, August 09, 2012 9:10 AM > To: Elecraft@mailman.qth.net > Subject: [Elecraft] [OT] Any good experience/recommendations with boost > regulators with K3? > > Hey, > > Sort of off topic, but I was wondering if anyone has any positive > experience using boost regulators fed from a lead acid battery to drive > their K3? Specifically I'm wondering which models might be relatively free > of emitted noise, are fairly efficient, and haven't messed up in a typical > RF environment. > > I use solar panels to keep a flooded lead acid battery array charged, then > run my ham stuff from that - but the battery voltage does sag lower than > I'd like under transmit, dropping down to about 12.0 VDC, so I'd like to > get it closer to 13.8 under load by using a boost regulator. > > Appreciate the bandwidth, and thanks in advance. > > 73, Bob, WB4SON > ______________________________________________________________ > 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 > ______________________________________________________________ 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
