When running some CW contacts on 40m, I had the unpleasant experience of having the rx go almost totally dead (very low noise level - no signals) immediately after calling a station. Nothing seemed to recover it so I power cycled the radio in time to hear the other station send ..--.. This happened a couple more times. I hadn't notice this happening before. The only new thing I had recently tried was the ALT1/ALT2 filter settings (pretty cool feature). While it is somewhat unpredictable, the phenomenon appears to be strongly correlated with the use of this feature. I have also found that I can recover from the "dead rx" condition by tweaking the shift or sometimes the width, but sometimes that doesn't work and I need to power cycle. Since then I've stopped using ALT1/ALT2 and haven't had it recur. Note: this problem appears in the new firmware as well as the last revision.
On a possibly related note - I was running the hi and low power tx gain cal procedure after updating the firmware. By mistake I spun the width knob instead of the pwr knob to adjust the power. At some point the filter setup got quite hosed - the width display showed around 4 khz, but the passband display was at minimum width. The next time I tried keying (holding tune) I got the nefarious ERR TXF message! I also noticed that the noise level on the rx was way down (I was connected to a dummy load) from where it was earlier. Power cycling the radio brought everything back to normal and I completed the cal. It appears that something is whacking filter parameters in the DSP - or at least that's what it's acting like. I've reported this to support at elecraft. Nevertheless, the radio kicks butt. The mojo is alive and well - worked 18 states this weekend including the west coast on 40CW loading my rain gutter through an SGC tuner! Rick AI1V K3 728 -- View this message in context: http://www.nabble.com/K3%3A-Loss-of-rx-signal-tp17053904p17053904.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
