Hi Bruce, I haven't tried JT-65 but I've been running PSK-31 on my K2 with the KPA100 power set at 50% (i.e., 50 watts) or less without any problems. Although my transmissions are not longer than several minutes each, I understand that at the power level, you could have much longer transmissions without problems.
Take care, Bob W1SRB PS- hope to see you at NEFFA this year -------------------------------------------------------------------------- Message: 1 Date: Thu, 26 Dec 2013 09:06:23 -0800 (PST) From: K1FFX <[email protected] <mailto:[email protected]> > To: [email protected] <mailto:[email protected]> Subject: [Elecraft] [K2] Safely running 100% key-down modes Message-ID: <[email protected] <mailto:[email protected]> > Content-Type: text/plain; charset=us-ascii I starting to use my K2/100 in two 100% key-down modes, JT-65 and PSK-31. What should I be keeping in mind in protecting the output stage for the K2 and for the KPA100? For JT-65, since it is a QRP mode, I'm running at about 5 watts, and transmissions are limited to about 45 seconds. So, I'm hoping that K2's output transistors will not be stressed in this mode. But, how about PSK-31? I'd like to run about 20 watts and each transmission could easily be 3 or so minutes. I don't know at what output power the base K2 runs when the KPA100 kicks in (i.e., at above 10 watts). I assume that normally the KPA100 will be loafing at 20 watts, but I'm not sure the impact of 100% key down on its output stage. I'd appreciate any guidance in keeping the K2/100 "safe" in these modes. Thanks - Bruce K1FFX ----- ______________________________________________________________ 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
