[Elecraft] Question on Volt meter in K2

[Tom Hammond NØSS]

Rick:

>OK... Things are going very well so far!  I have got to page 42 now.  I
>turned things on and all the messages come up and then it went to 40m
>displaying 7100 and then I was able to play with the buttons! IT WAS GREAT!
>OH YA.. My question... When I flip the switch on the control board and then
>hit the display button to show the volt meter it automatically shows .3 - .4
>volts flashing back and forth between the two.  The book said it should show
>00.0 but I get 00.3 or 00.4 volts.  Is that  a problem or that critical?  I
>read pin 1 on U1 and got 6.1 volts with the volt meter in the radio.   With
>my handy dandy RS Micronta Model 22-171 DVM I get 6.27 volts.  Just curious.

You don't have to flip the switch on the Control board UNLESS you intend to 
use the DVM probe (connected to P5) to measure voltages other than supply 
voltage on the K2. Otherwise, just leave the switch in the INT (12V) 
position. Pressing DISPLAY will then show supply voltage (about 0.6VDC low 
due to the in-line protective diode AND the in-line solid state fuse) along 
with current being drawn.

Tom Hammond   N0SS