> On Tue, Feb 7, 2012 at 3:23 PM, <n...@n5ge.com> wrote: > >> >> Is your dummy load absolutely a flat 1.0:1 from 1.0MHz to 30MHz? ================ Suppose that the SWR is 1.2. This means that 0.8% of the power is reflected (80 milliwatts reflected for 10 forward). If the SWR is 1.1, the reflected power is 0.2%. A simple coax jumper can sometimes cause an impedance bump large enough to reflect more power than that. A few minutes spent on a test bench with even the fanciest precision equipment will quickly disabuse one of the notion that a dummy load can be trusted to be "absolutely flat 1.0:1 from 1.0MHz to 30MHz."
Tony KT0NY ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
