Re: [Elecraft] K2: KAT2 null adjustment

2007-08-11 Thread 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 wi

Re: [Elecraft] K2: KAT2 null adjustment

2007-08-11 Thread Don Wilhelm
Peter, Yes, the KAT2 can be nulled without removing R6, and yes, obtaining a minimum reading of 10 or 11 is quite normal. The reason for initially having R6 not installed has to do with checking for shorts - but since the manual calls for a specific voltage range for the check, the null proc

[Elecraft] K2: KAT2 null adjustment

2007-08-11 Thread Peter Wollan
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 th