On Wed, 11 Jul 2007 11:22:15 -0700 (PDT), Chris Kantarjiev wrote: >What have other people set up along these lines? What website >should I be visiting? Is the "super" powergate really worth >double the price? :-)
I run my multi-receiver / multi-transceiver station from a 100 AH gel-cell float-charged by an allegedly regulated MFJ 45A switching supply through an isolation diode (one half of an automotive dual-battery isolator connected "backwards"). The steady-state load approaches 7A with all receivers and transceivers in "squelched/receive" mode. The battery bus (load) voltage is 13.4V which means that the battery is near the end of its life - it falls to 12.6V under load with the charger removed. I plan to replace it with a higher capacity battery bank by the end of the summer. I would rather set the bus voltage at the recommended 13.8 V float voltage. The only problem with this is getting the supply to maintain 14.6V. Right now it's at 14.2V and the isolator drop is the advertised 0.8V including the 0.2V drop through two shunts for measuring the battery and load currents. I hesitate to remove the isolation diode lest the supply voltage fall below the battery voltage for some reason and reverse current flows into the supply regulator. That can happen when "adjusting" the variable voltage output and it destroyed a linear supply that I had many years ago. That's how I do it. -- 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 _______________________________________________ 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
