[Elecraft] K2 Alignment & Test Part II

[Neil Zampella]

Hi,

Started to do the Align/Test Pt II, and properly saw the correct
frequency of 12090 +/- 30 kHz.   Tried the next part to adjust the
Reference Oscillator using my other K2 as the receiver and was able to
hear the oscillator at 3999, but C22 would not adjust to a
zero-beat.     OK ... so it was close for the time being, so I figured
I'd use my KX3 to verify it later.  Moved on to the range test.   The
Band- and Band+ buttons did not affect the display.

Dug into the list archives, and saw a number of messages from Don to
check the solder joints, alignment, and type of D16, D17, R19, and
L31.    I realized that somehow I missed installing R19.   So I
installed the resistor, then restarted the alignment.   This time when I
switched to CAL FCTR, the rig did not display the expected frequency of
12090, but  a frequency of 3560 or so, flickering between readings.  
However, when I pressed the Band- button, it changed to a steady 12084,
but when the Band+ was pressed, back to the 3560 flickering.

I checked the other areas as referenced by Don such as the thermistor,
but did not see any issues such as solder bridges, etc.   I really do
not want to remove the thermistor board to check closer, but will if
there are no resistance or voltage readings I could use to verify that
its OK.     I did verify the voltage readings as referenced by Don in
another message and they were within expected.

That said, I am rather limited in test equipment, with just a good
digital multimeter, so I can't put things on a scope, etc.    Any hints
would be appreciated, I can say I'm very sure I did not put any of the
ICs in backwards, I learned that the hard way when building my K2/100.

Merry Christmas to all, and a Happy New Year.

Neil, KN3ILZ