[Elecraft] 3rd time!
Ed, The PA temperature has not been properly calibrated. Check the menu entry for CAL TPA. Turn the K2 off and let it acclimate to the ambient temperature, then set the value for CAL TPA to the room temperature in degC. If you do not have a thermometer that reads in degC, convert from Fahrenheit by subtracting 32, then multiply by 5 then divide by 9. 73, Don W3FPR Hi Don, this would be the third time I've had to re-calibrate CAL-TPA! It's been changing on its own..maybe K100 possessed? __ 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
Re: [Elecraft] 3rd time!
... Hi Don, this would be the third time I've had to re-calibrate CAL-TPA! It's been changing on its own..maybe K100 possessed? ... As discussed in this old email thread, CAL TPA would be overwritten in my K2 after trying to TUNE on the wrong antenna: http://elecraft.365791.n2.nabble.com/PA-gone-crazy-next-episode-and-solution-td367668.html -John AC6SL __ 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
Re: [Elecraft] 3rd time!
Ed, The most common reason for CAL TPA to change on its own is if it is powered when the K2 is below zero degC - the value *should* go negative, but it instead goes to a very high number (255). If that is not the reason, I would look carefully at the KPA100 - possibly change Q3 and check the soldering of R5 and R6, then reset the bias on the PA transistors. 73, Don W3FPR On 5/30/2014 1:13 PM, Eddy via Elecraft wrote: Hi Don, this would be the third time I've had to re-calibrate CAL-TPA! It's been changing on its own..maybe K100 possessed? __ 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
