[Elecraft] Murphy-proofing was Re: Anderson PowerPoles

[Doug Faunt N6TQS +1-510-655-8604]

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
>
>
>
>
>
>
>
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