Mark, the numbers you quoted look pretty typical for SWR meters. They are *not* precision instruments, nor do they need to be even in commercial applications.
Within the range of error you reported, there will be no difference in how your K3 and antenna work. Power measurements are no better. Even a much-admired Bird wattmeter with freshly calibrated slugs can be off by 20% or more, depending upon several factors, and I've not seen a freshly calibrated slug since the last time I worked in a laboratory. So it's just as likely the difference you see is the result of external wattmeter calibration as it is the K3's wattmeter calibration. Any procedure for "synching" them is just as likely to make one of them less accurate that it is now. I presume that you are using a good 50 ohm dummy load to compare readings with the KAT3 in bypass, and that you have run the wattmeter calibration procedure in the K3 Owner's manual. 73, Ron AC7AC -----Original Message----- John, the problem is that I don't have one of these. But thanks for the suggestion. One thing I have not tried is hooking up my antenna and external wattmeter coupler with Antenna 2 instead of Antenna 1. I am anxious to find out if I get the same readings with #2 as I did with #1. I guess I am rather perplexed at the thought that there is such a variance between the K3 wattmeter vs an external wattmeter. Especially, when I connected the coupler to the antenna #1 with a plug and then attached the antenna coax to the coupler. It's a shame that the K3 does not have a way of synching up the internal wattmeter with an external wattmeter. Hopefully somebody from elecraft will read this email and make a comment on it. Thanks to all with their responses. Mark Griffin, KB3Z ______________________________________________________________ ______________________________________________________________ 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
