[Elecraft] counter probe

Tom Hammond NØSS [email protected]
Tue Oct 8 13:55:00 2002


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