[Elecraft] K3 Display Frequency Calibration
It appears that the folks who can't hear the wow-wow zero beat note are failing to turn on SPOT as specified in the K3 Owner's Manual for Method 2. Zero-beating the SPOT sidetone against the signal doesn't require hearing low tones, only hearing the amplitude modulation (wow-wow) of the sidetone as zero beat is approached. The variation in amplitude is easily heard; it sounds just like severe QSB or picket fencing. The procedure works best if the monitor sidetone (SPOT) level is set about as loud as the comparison WWV signal, using the front-panel MON control. I frequently find it necessary to turn SPOT back on as I tweak my Ref Osc. For whatever reason, SPOT often turns itself off, at least for me. 73, Paul W8TM Eric WA6HHQ sed: Is your RX EQ set to roll off lower freqs? The 1-5 Hz zero beat note is easily heard when listening to the WWV carrier beating against the CW spot tone on the K3. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Display frequency calibration
Jack, Check page 50 of the manual. I suggest using Method 2. Use the highest frequency WWV that you can reliably receive, and make certain you are zero beating with the carrier instead of one of the transmitted tones. 73, Don W3FPR On 10/4/2012 10:22 PM, Jack Berry wrote: I have s/n 3012, factory built. On a few occassions I have been told by a QSO partner that I am tuned a bit high. It has happened infrequently but I decided to check against WWV. Three questions: 1) is comparing to WWV a good method to confirm display accuracy? I used my P3 display to center the carrier at 2.5, 5.0, 10.0, 15.0 mHz. The centered carrier spike showed these offsets per WWV transmission; 2.500mHz centered at 2.499.962 5.000mHz centered at 4.999.972 10.000mHz centered at 9.999.984 15.000mHz centered at 14.999.995 2) If there is a better reference outside a lab, what is it? 3) And what is the procedure for correcting a frequency display error? I can't seem to find it in any of the manuals I have. Thanks!Jack - WE5ST __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Display frequency calibration
Thanks Don! Don't know how I missed that but I did. God Bless Best 73! Jack - WE5ST From: Don Wilhelm w3...@embarqmail.com To: Jack Berry we...@yahoo.com Cc: elecraft@mailman.qth.net elecraft@mailman.qth.net Sent: Thursday, October 4, 2012 9:31 PM Subject: Re: [Elecraft] K3 Display frequency calibration Jack, Check page 50 of the manual. I suggest using Method 2. Use the highest frequency WWV that you can reliably receive, and make certain you are zero beating with the carrier instead of one of the transmitted tones. 73, Don W3FPR On 10/4/2012 10:22 PM, Jack Berry wrote: I have s/n 3012, factory built. On a few occassions I have been told by a QSO partner that I am tuned a bit high. It has happened infrequently but I decided to check against WWV. Three questions: 1) is comparing to WWV a good method to confirm display accuracy? I used my P3 display to center the carrier at 2.5, 5.0, 10.0, 15.0 mHz. The centered carrier spike showed these offsets per WWV transmission; 2.500mHz centered at 2.499.962 5.000mHz centered at 4.999.972 10.000mHz centered at 9.999.984 15.000mHz centered at 14.999.995 2) If there is a better reference outside a lab, what is it? 3) And what is the procedure for correcting a frequency display error? I can't seem to find it in any of the manuals I have. Thanks!Jack - WE5ST __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net 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:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
