It only takes about ** a tenth of an ohm ** between K3 and power supply to drop 1.7 volts at 18 amps. Size of wire, bad crimp in a connector, tiny bit of corrosion, etc., etc.
AND, the tenth of an ohm may be spread out in different places. I have three feet of #10 to the K3, and I drop from 14.2 to 13.8 at 100 watts using an Astron RS 35A I adjusted up just a teeny. 73, Guy. ----- Original Message ----- From: "S Sacco" <[email protected]> > Harris - > > This is likely due to "I squared * R" losses in your DC cable; the voltage > is being reduced by the resistance of the cable. I had the same problem. > > How long is it? What gauge is it? Are there any fuses or other items > in-line with it? > > 73, > Steve > NN4X > > > > On Tue, Jun 2, 2009 at 2:07 AM, Harris Leck <[email protected]> wrote: > >> I am running my K3 off an Astron RS-35M. No load voltage at the rig is >> 14.0V (per the K3 display). Running approximately 100W this reading drops >> to >> 12.3V. Is this the norm? BTW current reads just under 18 amps. The amp >> meter >> reading on the Astron is way off.73 Harris K9RJ > ______________________________________________________________ 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
