A 100 MHz oscilloscope is an accurate way to measure RF power on the HF bands. Just connect it in parallel with the dummy load and use W3FPR's formula:
P = E^2 / 400 Where P is the power in watts and E is the peak-to-peak voltage read on the oscilloscope. Alan N1AL On Thu, 2011-12-08 at 16:47 -0600, Nate Bargmann wrote: > >From my experience, trying to measure 5W with a 100W element leads to > very inaccurate readings. The Bird is most accurate when the reading is > as near to full scale as possible. That means a 5W HF element (is that > even available?) would be ideal provided no more than 5W is put through > the meter. A 10W element would be less accurate but provide a safety > margin for the meter. Even better would be to have both elements and > use the 10W one to get in the ballpark and the 5W one for a final check. > > 73, de Nate N0NB >> > ______________________________________________________________ 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
