Thanks Don - My dummy load showed a 1:1 SWR on 40m with my last radio, but I have not used an analyzer to look at it. I suspect I'll be "close enough" (or at least I hope it is!) I think you are supposed to do the cal at 5 watts so no worries exceeding the power on the probe.
73 Tom On Fri, Jul 17, 2009 at 9:58 AM, Don Wilhelm <w3...@embarqmail.com> wrote: > Tom, > > Yes, you can use the RF probe. It *should* be OK up to a max of 20 watts > measuring across a 50 ohm dummy load. The 1N34A diode is rated at 45 volts > peak reverse voltage, so if you exceed 30 volts RMS (the RF Probe reads in > RMS volts), you are nearing the limit. > > The accuracy of your measurement depends on the accuracy of your dummy > load. It would be wise to check it with an antenna analyzer at the > frequency you will be using for calibration (40 meters is preferred) > > 73, > Don W3FPR > > > Tom Campie wrote: > >> Hey guys, I'm going to finish my KAT2 tonight and I need to calibrate the >> power and all that stuff. I have a 50 ohm dummy load so the SWR cal is >> good >> but I dont have a power meter. Can I use the RF probe that was made >> during >> the construction of the K2? If so, is there some documentation somewhere >> on >> how to do that? (note -I did not build my K2 so I have not used the >> integrated test equipment) >> >> Tom W0EA >> >> > ______________________________________________________________ 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
