Dave: You may have redefined Poynting’s Theorem!
Ed McCann > On Apr 7, 2023, at 6:23 PM, Dave New, N8SBE <n8...@densbe.com> wrote: > > Don, > > The KPA500 (and K3s) both show the correct wattage - 100W barefoot and about > 26W out of the K3s when the KPA500 is inline, and about 500W out of the > KPA500. > > I tried changing the P3 SensorCal value from 500 (default) to 350 (min) but > that only dropped the wattage shown by a little less than half. > > 73, > -- Dave, N8SBE > >> On 2023-04-07 16:48, W3FPR wrote: >> Dave, >> What power is displayed on the KPA500? The KPA500 would fault if >> indeed the K3s is putting out that much power. The KPA500 power bar >> is pretty accurate, just a bit coarse in its increments. >> I think a power calibration is in order for the P3 power indicator. >> 73, >> Don W3FPR >>> On 4/7/2023 2:12 PM, Dave New, N8SBE wrote: >>> So, I was the guy that had a P3 display/boot problem recently. >>> I sent it to the mother ship for repair, and they found that (get this) the >>> 12V supply was shorted to the 3.3V supply (eep!). >>> So, a new(er) I/O board (which contains the supplies) and a replacement >>> blown 3.3V LCD controller later, I have an (almost) fully functional P3 >>> again. >>> EXCEPT, the TX Monitor function is now funky. It claims that my K3s is >>> putting out 873 (or so) watts! I've tried both sensors (I had a 200W HF >>> sensor on the shelf since I added a KPA500 and changed to a 2KW HF sensor), >>> and although the scale max changes on the P3 display when I change sensors, >>> it still way overstates my output power. The KPA500 is showing 1360 watts >>> on the P3! >>> I unplugged/re-plugged everything, did a visual inspection of the TX >>> Monitor adapter board under a lighted magnifying glass, looking for >>> missing/broken SMD resistors or caps, but so far no soap. >>> I'm wondering if the new revision I/O board is somehow incompatible with >>> the older TX Monitor board, or maybe there is a missing 1M-ohm resistor to >>> ground on the I/O board at the sensor connector, or an incorrect series >>> resistor value there. >>> And yes, I sent a note to support, but I haven't heard back, yet. Wondering >>> if anyone (Alan?) has any ideas where this behavior is coming from. The >>> wattmeter in both my K3s and KPA500 are working normally. It's just the P3 >>> wattmeter that's gone off the deep end, now. >>> Thanks, and 73, >>> -- Dave, N8SBE >>> ______________________________________________________________ >>> 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 >>> Message delivered to w3fpr...@gmail.com > ______________________________________________________________ > 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 > Message delivered to edwmcc...@gmail.com ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
