[Elecraft] high-power tuner

[Rick Bates]

I'll take a guess...

You have to know the mass to find the amount of energy converted into heat.
Like Ohm's law, given two values, you can figure out the third.  If you know
the mass and know the temperature change, you can calculate the energy.

Ok Fred, am I close?

Rick wa6nhc

-----Original Message-----
From: Ian Kahn - Ham

This probably shows my gross lack of knowledge of the physics involved 
here, but what does the weight of the tuner have to do with its efficiency?

73,

--Ian

Ian Kahn, KM4IK
Roswell, GA
km4ik.ian at gmail.com
K3 #281, P3 #688


On 3/9/2012 6:14 PM, Fred Jensen wrote:
> On 3/9/2012 2:24 PM, WILLIS COOKE wrote:
>
>> If you need a tuner, your
>> antenna does not meet this criteria so, what are you using to form
>> your opinion?
> Weigh the tuner, then transmit continuously, measure the temperature
> rise, and when it's stable, calculate the heat loss [something to do
> with Boltzman's Constant -- the tuner *is* painted black].  What doesn't
> leave as heat must leave as RF.  Did it years ago on a 10 KW FM
> broadcast transmitter [4 ea 4-1000's], and it came within one percent of
> the efficiency measured with the water-cooled dummy load.  YMMV however.
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 2012 Cal QSO Party 6-7 Oct 2012
> - www.cqp.org
>
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