For that arrangement, you could also have the sets be vertical, rather than horizontal as shown. Remember, EACH and every individual connector has 4 possible orientations. It's possible to Murphy-proof even two pin arrangements. > http://qsradio.com/PPL-34%208-pole%20snap-in%20complete.JPG
I've not yet seen an answer to my question about fuse for the 12VDC OUT RCA jack on the K3. 73, doug On 26-Mar-11 09:39, Bruce Beford wrote: > Julian, G4ILO wrote: (Quoting N1RX) >> >> >> Another option for configuring multiple Powerpoles to prevent accidental >> reverse polarity is to arrange the connectors thus: >> >> B R R B >> B R R B >> >> > > With that arrangement couldn't you still plug the power cable in offset to > the left so the positive goes to the left-hand black terminal and the > negative is not connected. Easily done if you can't see what you are doing > and are trying to plug in the cable blind. If there is a connection back to > the power supply negative through ground connections you still have a short > circuit. OK, hopefully it will only blow a fuse not the radio, but with > other connector types that would not be possible. > > N1RX reply: Actually, Julian there is no chance of reverse polarity -IF- you > remember to invert the orientation of the left two pairs, as I mentioned > after the ASCII diagram in the original post: "With the left sets "flipped > over" compared to the right sets." > > For illustration, refer to the Powerpole products page on the QuickSilver > radio site: http://qsradio.com/Powerpoles.htm > > About halfway down the page, you see this note: > > "Note that in the assembled 8-pole mounts below, two of the sets are > "flipped over" so that the red housings are all in the center. This is done > to prevent the possibility of accidentally plugging in a cable with reversed > polarity. We urge you to follow this example if you assemble your own > cables and connectors." > > For a photograph showing this arrangement: > http://qsradio.com/PPL-34%208-pole%20snap-in%20complete.JPG > > This orientation makes accidental reverse polarity impossible. > > 73, > Bruce N1RX > > > > > > > > ______________________________________________________________ > 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 > ______________________________________________________________ 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
