[Elecraft] KAF2 Clock accurizing

[Randy Tompson]

Thought I would update my experience accurizing the KAF2 realtime clock.

Prior to accurizing, my clock was losing 0.6 seconds per day (8 seconds in 
14 days).

I tacked an 11pF cap parallel with C19 on May 19, 2002.

Since then, the clock has run 16 seconds slow, for an average loss of  -.07 
seconds per day.

I've been measuring the clock's accuracy once a week or so...  the time 
series is not linear.  For me, it follows a 2nd order function

         y = -.000153x^2 + 11.4435x - 213300.6

                 y = accuracy gap in seconds, vs. WWV

                 x = Excel date (Excel date for January 1, 1900 = 
1;   12/24/2002 = 37614)

                 R^2 = .996, 32 observations

I guess the accelerating decline (clock falling behind faster over time) is 
due to the battery aging?  My shack's air temp is fairly constant...

Best wishes for the holiday season.

WA4CIT

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a^2 + b^2 = c^2            Don't say can't.                    WA4CIT
x^2 + y^2 = r^2            Say won't.                        K2 #1860
(e^iPi)^2 + 0^2 = 1^2      Say don't know how.                K1 # 85
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