*Hi All,* * * *I am not reading the same voltage drop as Jeff so maybe he is not getting a correct reading.* * * *Voltage drop on #679 is minimal..)....0.01* * * *The display shows 0.3v from memory @ 100W* * * *73's* *Gary * On 25 March 2011 08:26, Don Wilhelm <w3...@embarqmail.com> wrote:
> 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 > -- *VK4FD - Motorhome Mobile Elecraft Equipment K3 #679, KPA-500 #018 Living the dream!!!* ______________________________________________________________ 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
