[Elecraft] Clock Accuracy

[Rick Dettinger]

My clock runs about 15 seconds fast by the end of summer, and this is  
made up by the following spring in my sometimes heated ham shack.  The  
annual error is very small.  But temperature is a factor.  I  
originally thought that all frequencies on the K3 would be controlled  
by the TCXO, but, of course, it is not running all the time.

73,
Rick Dettinger   K7MW



On Jun 24, 2010, at 11:00 AM, Wayne Burdick wrote:

> Hi John,
>
> The clock's accuracy is typically +/- 2 seconds per day. If that
> doesn't suffice for a long trip, and you don't have a timepiece to
> correlate it to, you could attempt to adjust the frequency of the
> clock crystal closer to 32768 Hz. This usually requires some long-term
> experimentation. Putting a frequency counter on the crystal will load
> it down unless you have a very low-C FET probe.
>
> There's a capacitor connected to the crystal that can be adjusted in
> value slightly without impacting the oscillator. It's easy to slow the
> clock down; just parallel a small amount of additional capacitance.
> Speeding it up requires a decrease in capacitance, which means
> removing a surface mount capacitor first. Let me know if you need
> advice on how to do this.
>
> 73,
> Wayne
> N6KR
>
>
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