Jack, The KPA500 power comes from the AC receptacle, not a 13.8 volt power supply, so take 20 amps off that total. And since you do not transmit on both the FT-7800 and the K3 at the same time, you do not have to add the 8.5 amps. As I sum the maximum required currents that will be drawn at any one time, 21 amps will suffice.
On 8/5/2011 5:18 PM, Jack Regan wrote: > The specifications according to the manuals are: > > K3 20.0 A (recommended) 3-4 (typical) NOTE: > When barefoot I run 100 Watts for CW, SSB and RTTY > P3 00 .5 A > KPA500 20.0 A > FT-7800 00.5 A RCV > NOTE: 6M, 2M, 440. Squelched. I sometimes have this on scan when working HF. > 08.5 A XMT NOTE: I > do not think I have ever transmitted on both at the same time. > > Do I really need a 49.5 amp continuous output PS? > > I have an ASTRON RS-70M that has been running for 10 years with no problems. > I was hoping to get a smaller, lighter supply to help simplify my setup. > This is one of the reasons I am thinking of the KPA500, in spite of its high > price. > One alternative I am considering is the MFJ-4245M. > > ______________________________________________________________ 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
