David, That piece of information indicates to me that your wattmeter is not accurate for power readings when the impedance is not 50 ohms.
You have the KAT2, and I presume you have calibrated it to agree with your QRP Wattmeter when it is connected to a 50 ohm load. The KAT2 does not change anything on the antenna side, it only creates a low SWR on its input side so the K2 PA transistors are "happy" - there will be no change of the antenna SWR (which is what the wattmeter is reading). With your report, I would hesitate to trust the reading of your QRP Wattmeter when it is connected to something other than a 50 ohm resistive load. 73, Don W3FPR On 1/10/2012 11:46 PM, David Dietrich wrote: > Evening All, > > I neglected to mention this one piece of information with my issue on the > K2/10. The pinning of my Wattmeter happens when I have the K2 connected to > my outside antenna in this order: K2 to Wattmeter to outside antenna. This > is after I do a tune and get a low SWR. My K2 DOES have the KAT2 tuner > installed. My antenna is a simple G5RV Jr. I originally said that I had it > connected to a dummy load and that was happening. Sorry about that. > > I did connect the K2 to my Wattmeter, and then to my Dummy Load, and power > output was within a Watt or so on different power settings. So, that tells > me the Wattmeter is calibrated within tolerances and the power out appears to > be accurate. I also verified this with my other HF radios, both kit AND > commercially produced. > > Still, I wonder what would cause my Wattmeter to be pinned at 5W when > transmitting into an actual antenna? > > The Wattmeter is the QRP Wattmeter from Oak Hills Research, and the 100 W > dummy load is from them as well. > ______________________________________________________________ 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
