Agree. And an Astron RS-35M does the heavy lifting in my shack. But a little wallwart can go a long ways when the Astron isn't in reach.
73, Christian AK4VV On Dec 18, 2012 9:33 PM, "Don Wilhelm" <[email protected]> wrote: > Ed, > > I for one would not trust any radio to a wall-wart power supply unless it > stated on the label that it was regulated. > > In most cases, the open circuit voltage will soar, and the KX3 maximum > voltage is 15 volts. Under the supply's rated load, the voltage will > normally reduce to the voltage on the label, but there is usually a wide > swing between no-load and full-load voltages. > > I would suggest a real power supply which is rated at 4 amps or more for > the KX3. > > My own KX3 runs off an Astron 30 amp supply and is fused for 10 amps to > protect the wire from any fault. > > 73, > Don W3FPR > On 12/18/2012 9:17 PM, Ed Picha wrote: > >> KX3 gurus: >> >> Has anyone found a wall wart they like for the KX3? Like most hams, I >> have a big box of wall warts, and have tried several different 12 V >> adaptors with the KX3. They all worked ok for general operation, but I >> noted that when I added the KXBC3 battery charger option to the KX3, I >> really needed an honest 13.8 V or higher to fully charge the internal >> batteries. Most of the warts I tried had outputs less than 13V, and the >> few that I found that could supply 13.8 V under load had voltages above 15 >> V with no load. I didn't want to take a chance with these by exceeding >> the KX3 upper voltage speceven for the short time that it would take for >> the adaptor voltage to drop. >> >> My KX3 current drain numbers are (all at 13.8 V): >> >> receive, with backlight: 0.190 A >> receive while charging batteries: 0.400 A >> transmit, 5W: 1.04 A >> transmit, 10W: 1.91 A >> >> So, I guess the ideal adaptor would be capable of 2A at 13.8 V to support >> running the radio with no (or fully discharged) batteries at full power, >> and would not exceed 15 V with no load. While I'm wishing, it would also >> be smalland lightweight. >> > > ______________________________**______________________________**__ > Elecraft mailing list > Home: > http://mailman.qth.net/**mailman/listinfo/elecraft<http://mailman.qth.net/mailman/listinfo/elecraft> > Help: http://mailman.qth.net/mmfaq.**htm<http://mailman.qth.net/mmfaq.htm> > Post: mailto:[email protected].**net <[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
