Are you sure you are seeing unequal steady-state power on mark and space? What I see on both of my K3's are significant (+/- 7%) power transients at the transition between mark and space. These transients show up vividly on an LED wattmeter, and I see the screen current on a high-gain tetrode amp jumping like crazy. I've complained about it on the reflector a couple of times, but so far there has been no improvement.
The transients can be easily seen by hooking up a hand-key to the FSK keying line and alternating between key-closed and key-open. When the key closes, power momentarily spike upward. When the key opens, power momentarily spikes downward. Steady-state power is equal, key up and key down. So far, nobody has complained about my signal, but amplitude modulation can't be a good thing on FSK. Dave Hachadorian, K6LL Big Bear Lake, CA -----Original Message----- From: Mark n2qt Sent: Thursday, August 25, 2011 2:41 PM To: [email protected] Subject: [Elecraft] unequal tone power output in FSK This was a thread a while back, (the twist in the tones is induced by passband ripple in the filters, worse with 5 poles) and there was a possibility of a software update to flatten the tones. I know it doesn't really affect anything, but watching the LEDs on the W2 flutter just doesn't seem right. Mark n2qt ______________________________________________________________ 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
