Consider using larger stranded wire. When making connections unravel a few outside strands and cut off so the remaining strands will fit the terminals being used correctly. The smaller (higher resistance) section of cable will be only part of an inch. Heatshrink tubing will cover the unsightly chop job.
Depending on the exact stranding configuration of the cable, going from #10 stranded, #8 stranded is 56-64%, and #6 stranded is 37-43% the resistance of the larger #10 cable. If going from #10 with individual strands of #26 wire to #6 cable with individual strands of #36 wire, the resistance can be as little as 35% of the larger #10 cable. Pete W4WWQ ----- Original Message ----- From: Leroy Buller <[email protected]> To: N4ZR <[email protected]> Cc: Elecraft List <[email protected]> Sent: 4/26/2020 11:53:28 AM Subject: Re: [Elecraft] Voltage drop in DX Power to K3 ________________________________________________________________________________ 40 inches of power cable. In my experiences, that could be an issue depending on the gauge of the wire. I used a long cable 12 gauge and had issues. Went to 24 inches number 10 gauge and voltage drop significantly improved. The resustace does not have to be large to cause a voltage drop Lee On Sun, Apr 26, 2020, 9:47 AM N4ZR <[email protected]> wrote: > I've had an e-mail exchange with West Mountain Radio. Measured the > voltage drop inside the 4005i at only .08 volts at 100 watts key down. > My power cable from the 4500i to the K3 measures 0.3 ohms on each > conductor, which at 20 amps should only yield a 1.2 volt drop, right? I > don't know where the other volt plus of drop is coming from. The cable > is 40 inches long, and only minor shortening is possible. It is about > the largest wire that will fit in the Powerpoles on both the K3 and the > 4005i. > > Suggestions welcome > > -- > 73, Pete N4ZR > Check out the Reverse Beacon Network > at <http://reversebeacon.net>, now > spotting RTTY activity worldwide. > For spots, please use your favorite > "retail" DX cluster. > > ______________________________________________________________ > 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 > Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected] ______________________________________________________________ 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 Message delivered to [email protected]
