Okay. I will go back to your first reply and run through the items you suggested.
Does the fact that on 40 and 80 meters, when I set the requested power to 100w, I actually see a little more - like 103w - but the power drops off on other bands - is that a clue to anything? Thanks, Mike NJ2OM > On Jun 28, 2020, at 10:50 PM, Don Wilhelm <[email protected]> wrote: > > Mike, > > No, the KPA100 wattmeter will display the actual power being produced if it > is well calibrated. > That is not necessarily the same as the requested power, although with a > properly working KPA100 and a calibrated KPA100 wattmeter, the reading should > be the same. > > 73, > Don W3FPR > >> On 6/28/2020 9:41 PM, Mike Kopacki wrote: >> I can run through some of the items you suggest. But I don’t have an >> external wattmeter that can measure 100 watts. I do have a QRP wattmeter. >> >> I will start tomorrow to try and work through the question. >> >> But to be completely accurate...you are saying that the KPA100 wattmeter >> (which is what I see when pressing TUNE and DISPLAY together), should read >> the same as the REQUESTED power (which is what the power knob sets)? >> >> Thanks, >> Mike NJ2OM >> >>>> On Jun 28, 2020, at 8:58 PM, Eric Norris <[email protected]> wrote: >>> >>> >>> Congratulations, Mike! Please let us ALL know how it goes, as we of the K2 >>> clan learn something with every post. >>> >>> 73 Eric WD6DBM >>> >>>> On Sun, Jun 28, 2020, 2:12 PM Mike Kopacki <[email protected] >>>> <mailto:[email protected]>> wrote: >>> >>> Well, that gives me something to do! I’ll let you know how it goes. >>> >>> Thanks, >>> Mike NJ2OM >>> >>> > On Jun 28, 2020, at 4:41 PM, Don Wilhelm >>> <[email protected] <mailto:[email protected]>> wrote: >>> > >>> > Mike, >>> > >>> > Congratulations on finishing the K2/100. >>> > >>> > On the power output variation, that is not normal. >>> > First check the voltage delivered to the K2 while in transmit. >>> > You should do that by tapping DISPLAY and scrolling to the >>> voltage display. Your power source should provide at least 13.8 >>> volts, but higher (up to 15 volts) is better. If the voltage >>> shown by the K2 display during transmit is less than 12.6, make >>> certain all power cable connections are tight. >>> > >>> > If the power supply voltage is not the problem, then remove the >>> KPA100 from the base K2 and realign the bandpass filters. >>> Connect a dummy load to the base K2 BNC ANT jack. After that, >>> check the maximum power from the base K2 - you should have at >>> least 10 watts on each band. Record the power for each band. >>> > >>> > Using a dummy load takes away any question about your >>> antennas. Always check into a dummy load - with an in-line >>> wattmeter if necessary. >>> > >>> > The other possibility is that you have a problem in the Low >>> Pass Filter in the KPA100. To check for that, re-install the >>> KPA100, but power the base K2 from the coaxial power jack (no >>> power to the KPA100 - connect the dummy load to the SO2339 jack >>> on the KPA100. >>> > Again check the maximum power on each band from the base K2. >>> It should be no more than 5% less than you found with the base K2 >>> only. >>> > If there is a substantial difference in power, then check the >>> KPA100 Low Pass Filter - particularly checking the number of >>> turns on the toroids. >>> > >>> > 73, >>> > Don W3FPR >>> > >>> > >>> >> On 6/28/2020 4:04 PM, NJMike wrote: >>> >> I did notice a variation on the power output on different bands: >>> >> 80m - 100w >>> >> 40m - 100w >>> >> 20m - 80w >>> >> 15m - 50w >>> >> 10m - 30w >>> >> SWR was never above 1.3-1. >>> >> Does that sound normal? >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[email protected] >>> <mailto:[email protected]> >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to [email protected] >>> <mailto:[email protected]> > ______________________________________________________________ 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 Message delivered to [email protected]
