Could it be that the actual crystal frequency is 4194204 Hz?
This is the 24th power of 2 (if my math is correct).
An easy way to get 1 pps.
Possibly a compromise between oscillator frequency and battery life.
Usually the higher the frequency, within reason, the easier it is to see
a frequency error.
Glenn
On 3/31/2019 5:29 PM, Neville Michie wrote:
Hi,
I have a Philips quartz clock that runs on 4.19 MHz.
In spite of the high frequency it still runs for years
on a C cell.
Can any of the quartz crystal gurus explain why this
frequency was chosen? I believe that this clock was
supposed to have better than usual accuracy.
Philips always had a high level of engineering excellence.
cheers,
Neville Michie
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Glenn Little ARRL Technical Specialist QCWA LM 28417
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