[Elecraft] KAT2 (K2 Antenna Tuner) Problems

[Fred Jensen]

Just finished the KAT2, first accessory to my otherwise vanilla K2
#4398.

1.  I ended up with a 47 ohm resistor left over and R6 on the control
board empty.  I can't find a place in the manual where it told me to
install it, but from the circuit, it seemes to be needed so I put it
in.  (Step 2 on pg 4 tells me to install R3, R4, and R5, and warns me to
be sure the 470 ohm resistor goes into R5 but never told me to install
R6.  I am a retired engineer, and thus I read things very literally --
maybe too much so?).

2.  Idle current drain was 0.24 ma before beginning tests and still is. 
Supply is a gel cell that is currently right at 12.0 volts.

3.  Going to the ATU menu, I get "- -" in the parameter field.  The
voltage on U1-1 is 11.7 (way too high) and checking across U3 (voltage
regulator, there is a 0.3V drop from the 12.0 volts input.  Nothing
appears amiss around the regulator on the control board.

Bad LM78L06 regulator?  What has happened to U1, U2, and U4 if there's
11.7 volts on all the pins where where there should be 6V?

On or off reflector replies from the Elecraft gurus appreciated.

73,

Fred K6DGW
Auburn CA CM98lw