[Elecraft] K3: reverse 12 volt supply

[ae4pb at carolinaheli.com]

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-bounces at mailman.qth.net] On Behalf Of
Richard Fjeld
Sent: Tuesday, September 15, 2015 1:02 AM
To: Fred Townsend; elecraft at 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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