Randy, Since the problem seems to be confined to times that the internal speaker is being used, I must ask if you have the synthesizer stiffener added to your K3.
Why it would suddenly become a problem when it was not before is anyone's guess, maybe the screws mounting the synthesizer board work a bit loose. If you do not have the synthesizer stiffener and you use the internal speaker, you should add it promptly. 73, Don W3FPR On 12/27/2010 4:59 PM, Randy Moore wrote: > What's happened to my K3? I've been noticing today that on rx, the CW > note of signals is slightly rough. It sounds just a little "fuzzy." If > I change modes to USB (no other changes), that roughness goes away > entirely. This is not the mechanical "fuzziness" that I've heard before > that's audio frequency dependent. It happens independent of the tone > frequency of the signal, though it seems more apparent at the lower > audio frequencies (I have my sidetone pitch set to 450). > > I have SPKR+PH setup on PF2, so I can turn it on and off quickly. > Listening just to the K3 internal speaker, this roughness is always > present. If I listen through my CM-500 headset, and toggle SPKR+PH from > YES to NO, the roughness remains on the signal for maybe a second, then > goes away. This must be a clue! > > This is K3 # 4564 (MCU 4.22, DSP 2.70) and I've been very happy with the > CW tone until today. I'm not aware that I've changed any settings > lately. I don't have NB or NR on. Just AGC-F (though it is independent > of AGC setting). It is independent of bandwidth. I have the 2.7kHz and > 400Hz filters, and it happens with either and any setting of the DSB > bandwidth. > > 73, > Randy, KS4L > ______________________________________________________________ > 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
