[Elecraft] K3 Suddenly died

[Richard Fjeld]

I stated the voltage drop across a resistance (the wire conductor) is 
directly proportional to the amount of current flow (amperage) through it.

For a given resistance, as the current increases through it, the voltage 
drop increases in it.

Changing the supply voltage will change the current flow through the same 
conductor resistance and affect the voltage drop in it.



-----Original Message----- 
From: Walter Underwood
Sent: Monday, October 07, 2013 10:20 AM
To: Elecraft Reflector
Subject: Re: [Elecraft] K3 Suddenly died

There is a point which could be made -- the percentage voltage drop is 
bigger at 12V than at 120V.

If the voltage drop on your power supply wire is 2V for a given current, 
that is the same regardless of the supply voltage. With a 120V supply, the 
wire will deliver 118V and with 13.8V it will deliver 11.8V.

So the same voltage drop can matter more at lower supply voltages.

Note that I'm ignoring the difference between AC and DC and skin effect.

wunder
K6WRU