[Elecraft] KAT2: Can't Get Bridge Null Adjustment (C55) Below 012 mV

I'm performing the Bridge Null Adjustment (C55) on my KAT2, but can't get it below 012. It is clear when adjusting C55 that I _AM_ centered in the middle of a dip. However, I can only get the value to go down to 012. Per the manual, I've checked T1's windings and their continuity and have checked

Re: [Elecraft] KAT2: Can't Get Bridge Null Adjustment (C55) Below 012 mV

It's a long time since I built my KAT2 but I seem to recall having a similar issue myself. I don't think it matters that much. To put my mind at rest I made a 100 ohms load capable of taking a few watts for a short period and checked that I got a 2:1 reading when transmitting into that, and 1:1

Re: [Elecraft] KAT2: Can't Get Bridge Null Adjustment (C55) Below 012 mV

Michael, Although an absolute null would indeed be zero, the 10 to 12 range is about as low as you can get - the K2 display is reading in millivolts and there is some noise picked up and coupled into the op amp input which limits the low end of the reading capability. The same problem is