Black and white...... the ultimate in color contrast. White is neutral
or no color so what's left? Black. Yes green sorta make sense when
the grass is green but what about Winter when it is brown?
No wonder I've been confused all my life.
73
Bob, K4TAX
K3S s/n 10,163
On 9/15/2015 8:20 AM, Charlie T, K3ICH wrote:
Seriously, it makes you wonder how the standard house wiring color code over
here in the colonies ever came up with black as the hot wire.
Green for ground makes sense though.
73, Charlie k3ICH
-----Original Message-----
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary
Sent: Tuesday, September 15, 2015 8:46 AM
To: ae...@carolinaheli.com; 'Richard Fjeld' <rpfj...@outlook.com>; 'Fred Townsend'
<fptowns...@earthlink.net>; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3: reverse 12 volt supply
What an interesting idea. Wonder why that has not become a standard?
(grin)
Gary
-----Original Message-----
From: "ae...@carolinaheli.com" <ae...@carolinaheli.com>
Sent: 15/09/2015 10:18 PM
To: "'Richard Fjeld'" <rpfj...@outlook.com>; "'Fred Townsend'" <fptowns...@earthlink.net>;
"elecraft@mailman.qth.net" <elecraft@mailman.qth.net>
Subject: Re: [Elecraft] K3: reverse 12 volt supply
I have an idea. Why not color code the wires so we know which one is positive
and which one is Ground (or neutral) ? Maybe make the positive lead red (like
hot, danger) and the other one anything, black, green...
Thoughts?
Notice: The above post is a weak attempt at humor, albiet sarcastic , and is
NOT INTENDED TO BE OFFENSIVE IN ANY WAY.
Jerry Moore
AE4PB, K3S SN# TBA later TOMORROW!!
-----Original Message-----
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Richard
Fjeld
Sent: Tuesday, September 15, 2015 1:02 AM
To: Fred Townsend; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3: reverse 12 volt supply
It was a passing thought as; how to use a diode without causing a voltage drop
was the original question.
AD5X has an OVP and Rev Polarity project on his website that would be better.
I couldn't think of the call sign at the time, so I suggested a relay.
(I've worked with huge contactors that were on motor-generators to prevent
run-aways)
73,
Dick, n0ce
On 9/14/2015 5:13 PM, Fred Townsend wrote:
Dick:
Relays? Sure, easy to do. Power relays are often used in many kinds
equipment. They are sometimes called 'contactors'. They are either big
and clunky or small and unreliable. Which kind do you want and what
are you willing to pay?
73
Fred, AE6QL
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