Jim, I can tell you what I'm very successfully using.
I have a Deka 95AH AGM battery that is on continuous charge via a homebrew 25A "smart charger". I also have a boost regulator to keep the supply voltage up to minimize TX IMD, even when the battery voltage is dropping during a power outage. The charger uses a modified Astron 35A supply to provide the raw DC and pass transistors. A slightly modified A&A Engineering card delivers the "smarts". Contrary to what some in this forum will tell you, this combination will not overcharge the battery, but will keep it fully charged even while transmitting at 100W, even during an RTTY contest. My battery sits on the floor under the operating desk. Wes --- On Tue, 11/27/12, Jim Miller <[email protected]> wrote: From: Jim Miller <[email protected]> Subject: [Elecraft] [K3} AGM Battery recommendation for K3 To: "Elecraft Reflector" <[email protected]> Date: Tuesday, November 27, 2012, 8:47 PM I've decided I might get a battery for my K3 for occasional operation to chase QRM issues. As long as I'm getting it for reception I thought I might consider one which would prove useful for transmitting as well. My "shack" is in the living area of our house with hardwood floors. I wouldn't be happy with an acid spill there. So I'm looking for battery size and type information and what sort of operating time I might expect with QRP and 100W levels (and anything in between...). Also would like some recommendations for practical handling and charging to avoid "issues." Charging would be from the AC line. No solar planned. I'm pretty sure an AGM deep cycle battery is what I've seen recommended. What else should I look for? All recommendations welcome. 73 Jim ab3cv ______________ ______________________________________________________________ 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
