Bob; The KPA500 does not use a Breune style bridge, but rather a true directional coupler. It does not need to be nulled; there is no adjustment.
There is an adjustment for the power; see the PWR ADJ setting in the manual. 73! Jack, W6FB > On Nov 17, 2019, at 6:58 AM, Bob McGraw K4TAX <rmcg...@blomand.net> wrote: > > I need to null the SWR detector on my KPA500. I've not found any adjustment > procedure as such. And from the schematic, there is none. > > I do have a rather precise Bird 50.5 ohm dummy load. I see SWR values higher > than 1:1 on the LED display and also on the LCD display on higher frequency > bands. I've found that the PWR ADJ does affect not only the indicated power > but the FAULT values as well. I am suspect that the SWR error likewise > affects the Fault actions. > > Any thoughts? > > 73 > > Bob, K4TAX > > > > > ______________________________________________________________ > 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 jackbrin...@me.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
