[Elecraft] K2: KAT2 null adjustment

[Leigh L Klotz, Jr.]

Peter,
One easy check is to make sure all relay pins are soldered.  It is easy 
to miss one, especially near one of the board vias (empty through-holes0 
and a missed coil pin gives you a 50% chance of having the relay stuck 
such that an extra L or C is on the at all times.
Others will respond with a more thorough checklist, but this is a really 
easy visual check.
73,
Leigh/WA5ZNU
On Sat, 11 Aug 2007 6:27 am, Peter Wollan wrote:
> According to the manual, it should be possible to adjust the null to
> 000, and it should be a broad null.  On mine, it was extremely sharp,
> and wouldn't get lower than 010, flickering to 011.  Does this indicate
> a problem?  I went ahead and finished the installation -- the voltages
> were fine, and the tuner seems to work just dandy.
>
> I'm using a homemade dummy load, which seems to test out ok at least at
> the lower frequencies, and I don't have a calibrated wattmeter (yet,
> will borrow one soon).
>
> Can/should the null be recalibrated, even though the resister has been
> installed?
>
> 	Peter N8MHD