[Elecraft] 4MHz Oscillator Calibration

[k4zm]

<<<My frequency counter probe gives me erratic readings during the 4MHz 
oscillator calibration.  However if I physically hold the 10pF capacitor 
during the test the readings settle down much nearer the frequency of 12090 
kHz +/- 30 kHz as described in the owners manual.  Can I consider the test 
in range?

Dave N1PT>>>


If this is a new K2 check Q9 and 10 on the control board.  If they have blue 
paint on the flat side of the transistors you need to call Elecraft and they 
will replace them for you.  They received a bad lot of MPS5179 transistors. 
They work but their gain at the operating frequency is too low to drive the 
input of the frequency counter.

73
Jim Younce  K4ZM