[Elecraft] K2 C22 calibration

[AE0MM]

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 <donwilh at 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.