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 [email protected] 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 > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
