Don is incredible! He always knows when something is amiss. My K2 became unresponsive while adjusting c22 because I managed to swap c7 and c21 capacitors on the control board during assembly.
And yes, I did need to read up on zero-beating using sideband, not cw mode. Thanks again, Don. --ae0mm ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Wednesday, September 19, 2018 1:10 PM, Don Wilhelm <donw...@embarqmail.com> wrote: > Mark, > > If you are trying to use a single signal, you must do it a bit > differently. look at > http://w3fpr.com/Using RWM instead of WWV.htm and substitute the > frequency of your generator for the frequency of the carrier only > standard station - RWM. > > Has your XG3 been calibrated for frequency? It is not a precision > frequency standard. > > The K2 dial frequency is always the frequency of the transmitted carrier > (or suppressed carrier for SSB). > In CW, the receive frequency is offset by the amount of your sidetone so > you hear the signal at your selected sidetone pitch. > > Make certain you have the filters on the right sideband. If you have > them correct, the DAC values for LSB, RTTY, and CW will be lower than > the DAC values for USB, RTTYrev, and CWrev (bar over the "r" or "c"). > > If you have the wrong sideband, the error will be twice the sidetone pitch. > > 73, > Don W3FPR > > On 9/19/2018 12:04 PM, AE0MM wrote: > > > I'm using the XG3. Attempts with both cw and usb mode have resulted in > > similar 1.5KHz to 2KHz differences in frequency display vs the output > > signal of the XG3. There is so much utility noise (arcing) at my QTH that > > hearing WWV can be difficult. > > Why doesn't the receive offset, when zero-beating using the spot tone, > > result in the correct VFO offset? Seems I'm generally confused about dial > > frequency in ssb and cw. > > I'll re-read everything again. It seems I'm wrongly assuming that > > zero-beating using a 600Hz tone would result in the dial frequency being > > off by -600Hz in usb. Tonight I'll use a spectrum analyzer and attempt dial > > calibration. > > Thanks, > > --mark/ae0mm > > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ > > On 19 September 2018 8:57 AM, Don Wilhelm donw...@embarqmail.com wrote: > > > > > Mark, > > > It sounds like you may be tuning to WWV using CW mode. CW mode uses a > > > receive offset equal to your sidetone pitch which can cause you to be in > > > error by twice the sidetone pitch. > > > What mode are you using when you tune WWV? It must be SSB, and you must > > > tune the transmitted tones correctly (do not tune to the carrier). 500 > > > and 600 Hz tones are sent on alternating minutes except for announcement > > > and silent minutes. A 1000 Hz tone is sent for 1 second at the > > > beginning of each minute. Make certain you are hearing the tones at the > > > correct audio frequency. > > > An audio spectrum analyzer running on your computer can be very helpful, > > > or set a receiver capable of receiving in AM mode to tune WWV as well as > > > the K2 and match the audio tones. > > > 73, > > > Don W3FPR > > > On 9/19/2018 9:19 AM, AE0MM wrote: > > > > > > > Don, > > > > Where I'm getting stuck is step one under SETTING THE K2 REFERENCE > > > > OSCILLATOR on this page: > > > > http://www.w3fpr.com/dial_cal.html > > > > Then step two on this page: > > > > http://www.w3fpr.com/n6kr_method.htm > > > > For a 10MHz reference, I'm unable to get the difference between TP1 > > > > (VCO) and TP2 (BFO) any closer than 10001.50. Attempts to get the > > > > difference of the VCO and BFO closer to 10000 result in radio becoming > > > > unresponsive. > > > > Thanks, > > > > --mark/ae0mm > > > > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ > > > > On 19 September 2018 6:59 AM, Don Wilhelm donw...@embarqmail.com wrote: > > > > > > > > > Mark, > > > > > The setting of C22 does not control the frequency readout directly. > > > > > The > > > > > frequency readout uses the contents of the EEPROM that are produced > > > > > when > > > > > you do the CAL PLL and CAL FIL procedures. > > > > > The only time C22 must be set correctly is just before you do a CAL > > > > > PLL > > > > > or a CAL FIL. At other times it is just a clock for the MCU and does > > > > > not need to be accurate. > > > > > I suggest you read the K2 Dial Calibration article on my website > > > > > www.w3fpr.com and proceed according to those instructions. > > > > > 73, > > > > > Don W3FPR > > > > > On 9/18/2018 9:27 PM, AE0MM via Elecraft wrote: > > > > > > > > > > > Just completed assembly of my K2. The VFO display reads about > > > > > > 1.5KHz high. I've attempted several times to calibrate it by > > > > > > adjusting C22, but I'm not able to get the frequency of TP1 on the > > > > > > 30m band any lower than ~14.9154MHz (while the vfo set to zero beat > > > > > > with a 10MHz signal) without it causing the radio to stop > > > > > > responding. > > > > > > When c22 is adjusted to a point where it lowers the frequency of > > > > > > TP1 below 14.915, the display freezes and it stops responding to > > > > > > button presses. If the power is cycled, no relays click and the > > > > > > display has no indication of life. When c22 is returned to the > > > > > > previous setting, the radio becomes responsive. ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
