Oh I just reread your post. My mistake. So running low power on the KPA is also problematic?
Chuck Jack Hawley KE9UW Sent from my iPhone, cjack > On Nov 21, 2019, at 10:32 PM, Bob McGraw K4TAX <rmcg...@blomand.net> wrote: > > I learned my lesson running 12 to 15 watts or so having to replace the KPA3A > twice. I now run 20 to 25 watts driving my KPA500 to rated output. Be it > CW, SSB or digital modes. Otherwise it is 100 watts when not running the > KPA500. Running conservative power doesn't get it. > > Bob, K4TAX > > > Sent from my iPhone > >> On Nov 21, 2019, at 9:15 PM, Dennis Ashworth <dennisashwort...@gmail.com> >> wrote: >> >> Makes you wonder how K3/10 users fair running high duty cycle modes at full >> output. I’ve replaced two sets of LPF drivers running 10W WSJT on my K3/100. >> No more! Now I advance the power until the amplifier engages (~12W). >> Hopefully this reduces driver dissipation. >> >> Dennis, K7FL >> >> >>> On Nov 21, 2019, at 5:15 PM, dgb <n...@bayland.net> wrote: >>> >>> Thanks for the good info Keith - I quit using 12w yrs ago as one E'craft >>> tech told me after the 1st one blew. >>> >>> Also heard from another that I could turn the fans on all the time which >>> should help as normally they are only on when you go to 13w and up. >>> >>> Will play with them - t u 73 Dwight NS9I >>> >>>>> On 11/21/2019 4:04 PM, Keith Trinity WE6R wrote: >>>> You can play with the Config Menu watt meter calibration high and low >>>> numbers to get the switch-over point different. >>>> IE where the Low power amp (LPA) switches to 100 amp (KPA3). This happens >>>> at 12W "indicated". >>>> The two Calibration numbers are for all bands! >>>> So; Go into config menu WMTR LP (below 12W) or HP (above 12W). (note 6 >>>> meters switches at 8W)! >>>> Make a note of both numbers so you can put them back! >>>> Extreme numbers to get the KPA3 to click in at lower actual power levels >>>> would be to set both for 180 (max). >>>> You will have to use an external watt-meter to see what is going on as the >>>> K3 internal watt-meter readout is all out of calibration now!! >>>> I just played with a radio and it switches over at about 7 watts with both >>>> numbers at 180 >>>> Have fun! >>>> Keith WE6R >>>> ______________________________________________________________ >>>> 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 n...@bayland.net >>> ______________________________________________________________ >>> 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: >> ______________________________________________________________ >> 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 rmcg...@blomand.net > > > ______________________________________________________________ > 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 c-haw...@illinois.edu ______________________________________________________________ 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
