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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
