The input too high only happens into a non-resonant load (tuner in circuit). Also noticed on 20 now when tuner is in operate there is a 3 dB drop in noise floor.
This is the second time the 3 watt resistor has desoldered itself from the board and both times the resistor is discolored. Only one RF path from radios through switching into amp input. Amp output feeds a 1x4 antenna switch. No other radios transmitting in near proximity. Definitely something failed on filter board. Dave wo2x -----Original Message----- From: Paul Baldock <[email protected]> Sent: Saturday, April 27, 2019 6:21 PM To: [email protected]; [email protected] Subject: Re: [Elecraft] KPA-1500 input too high Try it in to a dummy load. - Paul At 02:48 PM 4/27/2019, [email protected] wrote: >Hi All, > > > >KPA-1500 s/n 423 > > > >Operating 80 meter SSB running 20 watts drive with tuner engaged for >about >1240 watts out PEP. Remote app shows maximum power handling of 1620 watts. > >Out of nowhere I got an input power too high alarm @ 191 watts! The >radio is capable of 100 watts out max and verified is set to 20 watts. > > > >Set tune power to 10 watts. > >Meter in amp during standby reads 10 watts. > >Switch to operate and immediately get input power too high alarm @ 91 watts. > > > >Switch to 20 meters (resonant antenna). No issue - 10 watts tune is >approximately 400 watts out with no error. > > > >Any ideas? > > > >Dave wo2x > > > > > > > >______________________________________________________________ >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 ______________________________________________________________ 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
