[Elecraft] K2 Trouble - Help?

[Don Wilhelm]

Woodie,

You have apparently dialed the VFO from one band to another on 17m and 
15m.  The K2 VFO will not follow that much outside the ham bands (even 
thought the VFO display will change).

The fix is easy - do a Direct Frequency Entry to a frequency within the 
ham band for both bands.
Then re-do the bandpass filter alignment for those 2 bands - 15 meters 
first, and then 17 meters.

73,
Don W3FPR

On 5/18/2017 4:51 PM, woody wrote:

>
> I have an elderly K2 (S/N 02600)  that had been working well. After all
> these years, it was about 200 Hz off frequency so I proceeded to do an
> alignment.  Got it pretty close, but the trim cap (C22) would not pull
> quite on freq.  Close enough maybe...
>
> Proceeded with band by band alignment / peaking.  All bands peaked as
> expected except 17M, (maybe 15M too)....   No change when adjusting C32
> & C34  for 17M.
>
> More symptoms:
> * Stepping up the bands is normal until going from 20M to 17M. Then:
> 17M and 15M are reversed from normal progression.
> e.g:  160, 80, 40, 30, 20, _*15, 17*_, 12, 10
> * System Rx noise is significantly reduced on 17 & 15.
> * In CW mode, the Tx freq is OK on all but 15 & 17.
>
> The display reads as expected on 15 & 17 - as VFO is adjusted.   But, my
> freq counter indicates the actual Tx output freq is different and does
> not change when the display freq is changed:
> Example...  For 17, the Display indicates 18.120, the output is on
> 18.766+-.  For 15, the display indicates 21.265, the output is
> 21.434+-.  It is also receiving on the (actual but wrong) Tx freqs.
> Changing the VFO changes the display but does not change the actual TX
> or Rx frequency which seems to always be the same.
>
> I am stumped!!!   Can you offer any suggestions as to what might be
> happening???