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
