About twice a year I like to run through the cal's on my K2. Today, I was unable to store the BFO adjustments to eeprom and I noticed that the USB audio sounds muddy. Almost like the RF pot was turned down and the 2k audio filter active. The RTTY (USB) mode also sounds like this. LSB and CW are quite loud and clear with a more believable S-Meter response.
I was following the C22 cal Application Note procedure. The last few times I did this, the K2 "cal'ed" to within 10Hz of WWV. Before starting the cal today, it was 70Hz off. It is now within 30Hz post cal. The difference between TP1 and TP2 is negligible (limited by 10Hz DAC). My beat dial Freq. is/was 10.000.02 LSB (at this point when I triple checked the C22 cal) I used a soundcard program to "watch" the 10MHz WWV 500Hz and 600Hz tones while adjusting the BFO settings. Once it comes back to OPT1 from FIL4 the audio tones are back at their starting points and not were I set them. The BFO value did seem to save however. In LSB, the S-Meter showed S-3 (as did my other HF rig), on USB the meter was a solid S-9. The volume was not as loud and had more bass. I have a feeling this is just a matter of me forgetting a simple step but I can honestly say that I have followed the procedure word for word. I even double checked with the main K2 manual just to be sure. 73, Damon -- View this message in context: http://elecraft.365791.n2.nabble.com/k2-Poor-USB-audio-after-cal-tp6616641p6616641.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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
