I believe I read somwhere that you can do a mod to Astron power supplies to make the float chargable. They sell supplies that say they are for battery back-up, I suspect they are already modified for float charge.
Frank - W4NHJ ----- Original Message ----- From: "Ron D'Eau Claire" <[email protected]> To: "'Bill Miner'" <[email protected]>; <[email protected]> Sent: Monday, June 08, 2009 10:15 AM Subject: Re: [Elecraft] Battery Charging with DC Power Supply > Bill - K6WLM wrote: > > In the case of Astron supplies it can damage parts of the DC regulator. > If > there is a "Crow Bar" circuit that operates with a battery connected to > the > power supply output it will ruin your day or even burn your house down. > > --------------------------- > > How can that produce damage or a fire hazard? > > A "crowbar" shuts off the power supply so it produces no output if too > much > current is drawn from it specifically to protect the regulator. > > That might happen if the power supply is turned on when the battery is > discharged enough it demands more than the crowbar current limit, but the > crowbar is designed to avoid any dangerous or damaging operation. > > Typically, the supply remains *off* until the power switch is operated > manually, off then on, so it won't keep trying to feed current into a > short > circuit somewhere. I know that's how the Astrons I've used work. > > So, as far as I can see, the worse that could happen is you end up with a > dead battery if you have a discharge path with the supply off. > > > Ron AC7AC > > ______________________________________________________________ > 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 ______________________________________________________________ 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
