Re: [Elecraft] BFO on wrong sideband?
The web site provided is not active,my IE did not find it,could anyone tell what's the correct address? I am very interested to see it,thanks AD4C The difference between genius and stupidity is that genius has its limits.. -- Albert Einstein --- On Sat, 7/18/09, Tom Campie tom.cam...@gmail.com wrote: From: Tom Campie tom.cam...@gmail.com On Jul 17, 2009, at 10:13 PM, Don Wilhelm wrote: Tom, Go to my website www.w3fpr.com and study the article on K2 Dial Calibration. Part 3 of that article deals with setting the K2 filters. If you are not familiar with the use of Spectrogram for setting the K2 filters, I strongly suggest that you become familiar with it. Once you have used Spectrogram for that task once, doing it a second time is like falling off a log. Your K2 performance will be much better for the effort, and your ears will thank you. Yes, it is easy to get the BFOs on the wrong sideband by accident. Tune to a band below 15 meters when setting the filters - 40 meters is recommended for consistency, but others will do. There is a sideband reversal that takes place at 15 meters and higher, and using those bands for setting the filters will only cause confusion and the resulting frustrations that accompany such confusion. To prevent having the BFO on the wrong sideband, remember that the CW filter BFO frequencies (and/or DAC values) must be lower than the CWr BFO frequencies. Normal CW BFOs will have a frequency in the 4912.8 to 4913.5 kHz range while the CWr BFO frequencies will be in the 4914.2 to 4915.5 kHz range. Likewise, the SSB USB BFO frequencies will be higher than LSB and the RTTYr BFOs will be higher than the RTTY BFOs. Do these things in order. 1) Set the 4 MHz oscillator - use Wayne Burdick's (N6KR) method and view the 500 and 600 Hz tones transmitted by WWV on the Spectrogram display to be certain you have tuned WWV correctly (the K2 should be in LSB or USB mode). Then enter the menu for CAL FCTR and alternate the internal counter probe between TP2 and TP1 while adjusting C22 - you are looking for the point where the lower order digits on the display are the same at both points. The frequency at TP1 moves about 5 times faster than at TP2, so when doing the adjustment of C22, put the probe in TP1 - it is just easier that way. 2) Run CAL PLL (remember to put the probe in TP1 and the band to 40 meters). 3) Now put a noise source on the K2 antenna input and adjust the BFO frequencies (CAL FIL) to place the filter passband at the desired frequency on the Spectrogram display. Do that for *all* BFOs. If the passband position is already correct, move it up a notch and then back to the original - that will tell the K2 that the BFO has been changed and it will write new EEPROM values based on the new 4 MHz oscillator frequency, and that is exactly what you want to accomplish. When you are done, check the tuning of WWV - it should be within 20 Hz which is the DAC limit or the K2 (look at the tones transmitted by WWV to verify) 73, Don W3FPR Tom Campie wrote: I just got my K2 used and I went through and adjusted the CW filters because I like mine lower than the previous owner but i have a feeling I botched it up - I'm zero beat to the ARRL at 14.046.84, and they transmit on 14.047.5 MHz. I also tried re- aligning the VFO based on a zero beat on WWWV so I'm not sure where I'm wrong. Please help! Tom W0EA __ 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] BFO on wrong sideband?
On 18 Jul 2009 at 4:10, Hector Padron wrote: The web site provided is not active,my IE did not find it,could anyone tell what's the correct address? I am very interested to see it,thanks AD4C http://www.w3fpr.com/ works fine here (nice site...). 73 Dave G3YMC http://www.davesergeant.com __ 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] BFO on wrong sideband?
I just got my K2 used and I went through and adjusted the CW filters because I like mine lower than the previous owner but i have a feeling I botched it up - I'm zero beat to the ARRL at 14.046.84, and they transmit on 14.047.5 MHz.I also tried re-aligning the VFO based on a zero beat on WWWV so I'm not sure where I'm wrong. Please help! Tom W0EA __ 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] BFO on wrong sideband?
Tom, Go to my website www.w3fpr.com and study the article on K2 Dial Calibration. Part 3 of that article deals with setting the K2 filters. If you are not familiar with the use of Spectrogram for setting the K2 filters, I strongly suggest that you become familiar with it. Once you have used Spectrogram for that task once, doing it a second time is like falling off a log. Your K2 performance will be much better for the effort, and your ears will thank you. Yes, it is easy to get the BFOs on the wrong sideband by accident. Tune to a band below 15 meters when setting the filters - 40 meters is recommended for consistency, but others will do. There is a sideband reversal that takes place at 15 meters and higher, and using those bands for setting the filters will only cause confusion and the resulting frustrations that accompany such confusion. To prevent having the BFO on the wrong sideband, remember that the CW filter BFO frequencies (and/or DAC values) must be lower than the CWr BFO frequencies. Normal CW BFOs will have a frequency in the 4912.8 to 4913.5 kHz range while the CWr BFO frequencies will be in the 4914.2 to 4915.5 kHz range. Likewise, the SSB USB BFO frequencies will be higher than LSB and the RTTYr BFOs will be higher than the RTTY BFOs. Do these things in order. 1) Set the 4 MHz oscillator - use Wayne Burdick's (N6KR) method and view the 500 and 600 Hz tones transmitted by WWV on the Spectrogram display to be certain you have tuned WWV correctly (the K2 should be in LSB or USB mode). Then enter the menu for CAL FCTR and alternate the internal counter probe between TP2 and TP1 while adjusting C22 - you are looking for the point where the lower order digits on the display are the same at both points. The frequency at TP1 moves about 5 times faster than at TP2, so when doing the adjustment of C22, put the probe in TP1 - it is just easier that way. 2) Run CAL PLL (remember to put the probe in TP1 and the band to 40 meters). 3) Now put a noise source on the K2 antenna input and adjust the BFO frequencies (CAL FIL) to place the filter passband at the desired frequency on the Spectrogram display. Do that for *all* BFOs. If the passband position is already correct, move it up a notch and then back to the original - that will tell the K2 that the BFO has been changed and it will write new EEPROM values based on the new 4 MHz oscillator frequency, and that is exactly what you want to accomplish. When you are done, check the tuning of WWV - it should be within 20 Hz which is the DAC limit or the K2 (look at the tones transmitted by WWV to verify) 73, Don W3FPR Tom Campie wrote: I just got my K2 used and I went through and adjusted the CW filters because I like mine lower than the previous owner but i have a feeling I botched it up - I'm zero beat to the ARRL at 14.046.84, and they transmit on 14.047.5 MHz.I also tried re-aligning the VFO based on a zero beat on WWWV so I'm not sure where I'm wrong. Please help! Tom W0EA __ 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] BFO on wrong sideband?
That did it Don! I did in fact have the CW filters on the wrong side of the band...should have looked in the manual to see where the frequencies were supposed to be. I think I'm within about 5 to 10 Hz of WWV and the ARRL practice is coming in right on my sidetone freq. Now its time for some major contacts! Thanks for the help. 73 Tom W0EA On Jul 17, 2009, at 10:13 PM, Don Wilhelm wrote: Tom, Go to my website www.w3fpr.com and study the article on K2 Dial Calibration. Part 3 of that article deals with setting the K2 filters. If you are not familiar with the use of Spectrogram for setting the K2 filters, I strongly suggest that you become familiar with it. Once you have used Spectrogram for that task once, doing it a second time is like falling off a log. Your K2 performance will be much better for the effort, and your ears will thank you. Yes, it is easy to get the BFOs on the wrong sideband by accident. Tune to a band below 15 meters when setting the filters - 40 meters is recommended for consistency, but others will do. There is a sideband reversal that takes place at 15 meters and higher, and using those bands for setting the filters will only cause confusion and the resulting frustrations that accompany such confusion. To prevent having the BFO on the wrong sideband, remember that the CW filter BFO frequencies (and/or DAC values) must be lower than the CWr BFO frequencies. Normal CW BFOs will have a frequency in the 4912.8 to 4913.5 kHz range while the CWr BFO frequencies will be in the 4914.2 to 4915.5 kHz range. Likewise, the SSB USB BFO frequencies will be higher than LSB and the RTTYr BFOs will be higher than the RTTY BFOs. Do these things in order. 1) Set the 4 MHz oscillator - use Wayne Burdick's (N6KR) method and view the 500 and 600 Hz tones transmitted by WWV on the Spectrogram display to be certain you have tuned WWV correctly (the K2 should be in LSB or USB mode). Then enter the menu for CAL FCTR and alternate the internal counter probe between TP2 and TP1 while adjusting C22 - you are looking for the point where the lower order digits on the display are the same at both points. The frequency at TP1 moves about 5 times faster than at TP2, so when doing the adjustment of C22, put the probe in TP1 - it is just easier that way. 2) Run CAL PLL (remember to put the probe in TP1 and the band to 40 meters). 3) Now put a noise source on the K2 antenna input and adjust the BFO frequencies (CAL FIL) to place the filter passband at the desired frequency on the Spectrogram display. Do that for *all* BFOs. If the passband position is already correct, move it up a notch and then back to the original - that will tell the K2 that the BFO has been changed and it will write new EEPROM values based on the new 4 MHz oscillator frequency, and that is exactly what you want to accomplish. When you are done, check the tuning of WWV - it should be within 20 Hz which is the DAC limit or the K2 (look at the tones transmitted by WWV to verify) 73, Don W3FPR Tom Campie wrote: I just got my K2 used and I went through and adjusted the CW filters because I like mine lower than the previous owner but i have a feeling I botched it up - I'm zero beat to the ARRL at 14.046.84, and they transmit on 14.047.5 MHz.I also tried re- aligning the VFO based on a zero beat on WWWV so I'm not sure where I'm wrong. Please help! Tom W0EA __ 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] BFO on wrong sideband?
Tom, That is great. Now enjoy that K2. 73, Don W3FPR Tom Campie wrote: That did it Don! I did in fact have the CW filters on the wrong side of the band...should have looked in the manual to see where the frequencies were supposed to be. I think I'm within about 5 to 10 Hz of WWV and the ARRL practice is coming in right on my sidetone freq. Now its time for some major contacts! Thanks for the help. 73 Tom W0EA __ 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
