[Elecraft] KAT2 Adjustment Questions

[Don Wilhelm]

Mike,

You might try the bridge null a few times and take the average 
position.  It is quite 'touchy', and yes it may vary a bit from trial to 
trial.  As noted in the manual, the reading at the null depends on stray 
capacitance in the KAT2 - so if you moved anything it will change a bit, 
although a jump up to 30 is quite a bit.

The 3 to 4 volts depends on the exact power as well as the number of 
turns on T1.  If you have some way of monitoring the power output, you 
can see if the actual power is below 5 watts - if so, all is well.  If 
not, check T1 to see if you wound it with the correct number of turns.

73,
Don W3FPR

On 8/30/2013 5:09 PM, Michael Eberle wrote:
> Hi,
>
> I am in the process of installing the KAT2 and need some clarification 
> on the bridge null adjustment procedure.  Following the instructions, 
> I set the slot of C55 parallel to the K2 rear panel.  After activating 
> TUNE I can adjust it down to about 002 or so.  Then if I put it back 
> into receive, then activate TUNE again, it goes back up to about 030.  
> Is this normal?   Also, on pin 1 of U4, I am seeing about 2.7 to 2.8 
> volts.  Is this close enough to the 3 - 4 volts specified in the manual?