[Elecraft] VFO Cal measurements for #2006/Rev B

[Rod N0RC]

Folks,

After reading the posts about VFO calibration I got to wondering 
how my K2 looked. So, I powered up my k2 and 746pro for about 
one hour, then made the calibration table below.

Both rigs were in CW mode as I achieved the best zerobeat
possible against WWV.

Then, using the 746 as a "signal generator" [into a dummy load,
at low power] I zero beat the signal on my K2.

Overall the K2's dial calibration is quite respectable up to
17m. 15-10m is a little worse than I would like, but is
acceptable.

Anybody have ideas on how I can make things even better?


Test     746        K2         K2
Freq     zerobeat   zerobeat   zerobeat
(kHz)    to WWV     to WWV     to 746


 2500    2500.003      --         --
 3560      --          --       3560.05
 5000    5000.006      --         --
 7040      --          --       7040.02
10000   10000.012   10000.02      --
10116      --          --      10116.00
14060      --          --      14059.97
15000   15000.018   14999.98      --
18080      --          --      18079.94
20000   20000.024   19999.78      --
21060      --          --      21059.76
24900      --          --      24899.72
28060      --          --      28059.70

CONCLUSIONS

80-20m   K2 dial after warm-up, dial is accurate to
         within ~50Hz or less

17m      K2 dial after warm-up, dial is accurate to
         within ~80Hz or less

15-10m   K2 dial after warm-up, dial is accurate to
         within ~350Hz or less


***Happy Holidays***
73, Rod N0RC