In Navy-Marine Corps MARS, we use a *lot* of digital modes, including PSK31 and a double handful of others. On this KX3/KXPA100, I normally use no more than 25W for PSK and a little more for some of the others. On MT63, I use 30W. Most data modes don't need a lot of SNR to decode. It also depends on transmission length. If I'm going to transmit MT63 for five minutes straight, I run the power down to 20W.
I'm not sure there is a recommended output power setting for data modes using the KX3/KXPA100, but you can find out yourself by monitoring the PA.X temp on the VFO B display (your room temperature is different from others'). If you see the temp rise to more than you're comfortable with, back down on the power. Using the settings stated above keeps the KXPA temp at comfortable levels at this station, usually < 50C, but sometimes a bit over. The amp will protect itself by lowering output power if the temp runs too hot. Like everything Elecraft makes, the hardware and software are very robust. 73, matt W6NIA On Fri, 21 Feb 2014 19:43:42 -0800, you wrote: >I just ordered a KPA100 with the auto tuner for my KX3. In anticipation of the >arrival of the amp I was looking at the operating manual online and did not >see any recommended power setting for operating the amp with digital modes. I >plan to use the amp for PSK31. What is the recommended max power setting for >the amp using PSK31 with a KX3? > >Thanks, >Glenn Maclean WA7SPY Matt Zilmer, W6NIA -- "Give me six hours to chop down a tree and I will spend the first four sharpening the axe." -A. Lincoln ______________________________________________________________ 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
