[time-nuts] Re: Subject: Re: Leviton VTP24 Is this Time Accurate enough? - Line Frequency and TXOs

[D. Resor]

In Southern California Edison's region I know that 60Hz used as a time
reference has been unstable in possibly the last 10+ years.  I have found
that depending on whether in the summer clocks which use this reference tend
to run slower, and in the winter they run faster.

Have you noticed that in some way it between running fast or slow the
gain/loss combination averages out over the course of the year?

Don Resor

-----Original Message-----
From: Thomas D. Erb <tde at electrictime.com> 
Sent: Saturday, August 28, 2021 4:16 AM
To: time-nuts at lists.febo.com
Subject: [time-nuts] Subject: Re: Leviton VTP24 Is this Time Accurate
enough? - Line Frequency and TXOs

We have been running long term tests on a TXO  chip we use for time keeping
vs line frequency vs NIST time.

Over 4 years the TXO is within 4 minutes Line Frequency 9 minutes

The TXO is well within specification - and the line frequency is off because
we lose power in our leafy Boston suburb a lot - and the control fall over
to an older time keeping chip.




Thomas D. Erb
p:        508-359-4396
f:        508-359-4482
a:        97 West Street, Medfield, MA 02052 USA
e:         tde at electrictime.com
w:        www.electrictime.com
Tower & Street Clocks Since 1928

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