[Elecraft] Measuring Losses in an ATU

[Fred Jensen]

I once [1959] measured the efficiency of a 10 KW FM broadcast 
transmitter using a variant of Ron's suggestion.  Came within 0.9% of 
the value eventually measured on a water-cooled dummy load -- which was 
about the accuracy of my K&E Log-Log Duplex Vector rule.  Never 
underestimate the ingenuity of us old guys. :-)

73,

Fred K6DGW
Sparks NV USA
Washoe County DM09dn


On 11/3/2016 4:12 PM, Dauer, Edward wrote:
> I loved Ron’s (AC7AC’s) alternative method for measuring power losses
> in an ATU (reprinted below.)  But if I remember my high school
> physics correctly, wouldn’t one have to know the specific heat, and
> the mass, of every bit of matter in the enclosure that participates
> in the thermal equilibrium in order to calculate the energy loss from
> the temperature rise?  That made me wonder if Ron offered it
> tongue-in-cheek.