[Elecraft] Elecraft Digest, Vol 114, Issue 11

[Don Wilhelm]

OK Joe,  You are correct.  It has been a very long time since I have 
been involved with heat related science issues.  More current equals 
more heat (for a given resistance) has been sufficient for me most of 
the time without getting into the exact math.

It is good to know that some folks here still have those formulas on the 
top of their heads.

73,
Don W3FPR

On 10/7/2013 5:57 PM, Joe Subich, W4TV wrote:
>
> On 10/7/2013 5:31 PM, Don Wilhelm wrote:
> > Geesh, how is that possible - twice the current equals twice as much
> > heat and will exceed the capacity of the wire.
>
> Sorry, Don ... twice the current => *four times* the heat. Heat
> (energy in Joules) = Watts * seconds.  One Joule (one Watt-second)
> is 2.78e-7 kW*h
>
> 73,
>
>    ... Joe, W4TV