That'd help to explain why I was able to eke a last QSO out of a fading battery by winding the power down (as mentioned in an article in this February's RadCom). It was the only SOTA summit-to-summit I managed that day, too!
Of course, next time, I'll try to remember to charge ALL my batteries properly before setting off up to a summit, and then also put them ALL in my pack.... On Tue 26 Jan Wayne Burdick wrote: > There are two windings on the PA output transformer: 1:1 and 1:4. We > select one of these based on power level, battery voltage, and in some > cases, operating mode. > > In the 1:1 setting, the PA drain impedance is 50 ohms, making it more > efficient for at power levels, reducing current drain. > > In the 1:4 setting, the PA drain impedance is 12.5 ohms; the > transformer steps it back up to 50 ohms for the low-pass filters. In > this case it's more efficient at higher power levels, at the expense > of higher current drain. -- 73, Rick, M0LEP (KX3 #3281) ______________________________________________________________ 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
