"> Something is wrong - "No KIDDING !!!! Be very careful in blaming something that your "test" procedure is accurate and not faulty. Sometimes the eggs you get in your face are large enough to hurt.
73, de Jim KG0KP ----- Original Message ----- From: "Don Wilhelm" <w3...@embarqmail.com> To: "Jeff Cochrane - VK4BOF" <vk4bof.elecr...@gmail.com> Cc: <elecraft@mailman.qth.net> Sent: Thursday, March 24, 2011 4:26 PM Subject: Re: [Elecraft] Anderson Powerpoll connector > Jeff, > > Something is wrong - the specification on the contact resistance of the > APP connectors is 600 microohms. > At a 20 amp current load, that should only result in a 0.012 volt drop > across the connector. Are you certain you are measuring correctly > (directly across the connector)? Or are you relying on the K2/K3 > display voltage to determine the drop. Both have a series diode > in-line, and the displayed voltage will be less than the power supply > voltage - not due to the APP connector, but to the series diode. > > 73, > Don W3FPR > > On 3/24/2011 6:08 PM, Jeff Cochrane - VK4BOF wrote: >> I have to admit that I am not a fan of APP's either. >> I just cannot relate to the voltage drop across the connectors when >> drawing 20+A. >> On my rig (with its factory built cable) it approaches 1.2 Volt. (And >> yes, the connectors do get warm!) >> Even with decent cables that I have made using 4mm wire and 45Amp PP >> connectors I still see .6 to .8V drop. >> That to my mind is not acceptable. >> So, once the warranty expires on my K3 (in May) I am going to ditch the >> APP's and solder a fly lead of 4mm twin lead wire directly to where the >> APP's were or look at some (better) alternatives. >> >> >> Jeff Cochrane - VK4BOF >> Elecraft K3 # 4257 >> ----- Original Message ----- >> From: Ron D'Eau Claire >> To: elecraft@mailman.qth.net >> Sent: Friday, March 25, 2011 7:55 AM >> Subject: Re: [Elecraft] Anderson Powerpoll connector >> >> >> At the risk of re-energizing an old debate, I have *never* crimped a >> PowerPole connector and have *never* had a problem. All of mine are >> soldered >> just as Elecraft recommends if you don't have the correct crimp tool. >> >> In the APP Power Supply Cable Kit instruction sheet is a detailed >> cut-away >> drawing of how the APP connector contacts insert into the shell and >> lock for >> solid, reliable contact. >> >> Ron AC7AC >> >> >> >> >> -----Original Message----- >> >> I guess my problem is: after reaching a certain age I have developed a >> bag >> full of skills, which have served me very well for over a half >> century. >> Installing small connectors is a piece of cake, that is until I came >> against >> the APP. Didn't think needed to read the instruction sheet. After >> all, I >> should be able to correctly install this with my bag of knowledge, >> right? >> Now that I have achieved a higher level of connector expertise, I >> still >> prefer the Molex, but that's me. >> Also, something about having to buy a $30 crimper to do the right job >> tends >> to rub me in the wrong direction as well. >> Thanks for the bandwidth. >> BillHarris-w7kxb/7 >> (long live the KISS principal) >> >> > From: k6...@me.com >> > Date: Thu, 24 Mar 2011 12:31:14 -0700 >> > To: elecraft@mailman.qth.net >> > Subject: Re: [Elecraft] Power Shut Down Resolved! >> > >> > When making up APP connectors, you have to be VERY sure that the >> little >> lip on the connecting pin (the part that's soldered onto the wire) >> extends >> completely into the plastic housing so that it locks itself over the >> metal >> part inside the plastic housing. Viewed from the side it looks >> something >> like this: >> > >> > =============\ >> > ------------- \ >> > >> > where the double line (string of = signs) represents the connector >> that's >> soldered onto the wire, the diagonal slashes represent the lip at the >> end of >> that connector, and the single line of dashes represents the metal >> part of >> the plastic housing. If you can pull the wire out, it ain't locked in >> place. >> > >> > Once I realized this, I have never had a problem with APPs. >> > >> > >> > Lew K6LMP >> > >> >> >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:Elecraft@mailman.qth.net >> >> 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:Elecraft@mailman.qth.net >> >> 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:Elecraft@mailman.qth.net >> >> 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:Elecraft@mailman.qth.net > > 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
