[Elecraft] counter probe

[George, W5YR]

Thanks, Tom - I will do a very careful examination of the K2 output signal
with this in mind.

TP2 in on the BFO signal line to the transmit mixer U10. So, I can
appreciate that any lack of integrity in the shielding of the FCTR probe
cable could allow other signals from the RF Board to be picked up and
introduced into the mixer input.

I find nothing in the manual about what to do with the probe after
completing CAL FIL, but perhaps something has been posted on the list.

73/72, George    
Amateur Radio W5YR -  the Yellow Rose of Texas
In the 57th year and it just keeps getting better!
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
K2 #489      Icom IC-765 #2349     Icom IC-756 PRO  #2121

Tom Hammond N�SS wrote:
> 
> Hi George:
> 
> At 12:05 PM 10/8/02, George, W5YR wrote:
> >I am missing a serious point, as a new K2 owner. What is wrong with leaving
> >the probe in TP 2 all the time? That way CAL FIL is always available for
> >inspection of passbands, retuning, or whatever, without removing the top
> >cover.
> 
> Someone will probably respond in a much more illustrative manner, but it is
> my understanding that leaving the FCTR probe connected to TP2 can result in
> some spurious signals (possibly) being transmitted... albeit at probably a
> very low level.
> 
> For easily two years, I retained my FCTR probe in TP2... never noticed any
> problems. However, IF there is even a remote possibility of such spurs, and
> especially if the KPA100 is installed, I don't want to change having the PA
> (or the KPA) amplifying them and having them go out to the antenna.
> 
> Just best to not risk it, even if it is a remote possibility.
> 
> However, I am ADAMANT about retaining the FCTR probe INSIDE my K2... WAY
> too easy to either misplace or to just not have it available if I'd happen
> to need it while on a trip where I couldn't find/make one quickly. Two
> years in a row, when I was offering free Spectrogram XFIL alignments at
> Dayton, I had numerous K2 owners bring in their K2s without the FCTR cable
> and I'd have to cannibalize my K2 in order to complete their alignments...
> a couple times I almost left mine in their K2!
> 
> 73,
> 
> Tom  N0SS