My cost: under $300.
This version foregoes any display but adds an oven controlled quartz oscillator (OCXO). This keeps the XO within a tight temperature band in order to stabilize its rate, both when the clock is autonomous and for the more usual application of correctly subdividing the 1 pulse/second…
An oven-controlled crystal oscillator (OCXO) is said to be chronometrically superior to a thermocompensated XO (TCXO) such as those we have in our HAQ watches.
I gather it is because the ‘oven’ maintains the XO in its turnover temperature, where the T…
Continue readingAttached is a Citizen Technical Manual obtained from the Cousins UK web site, if memory serves.
My best guess at the date is 1985, from the last page:
…
Continue readingI have selected a ‘starter’ model as below:
The interesting bit is that it claims to also read the PNT sats of Rus…
Continue reading@gaijin replied that his X-33’s MET (mission elapsed timer) had not varied from the timekeeping of the watch for over 900 days.
@Tom-HK said, “Given that we assume a count correction application after a particular inhibition period, as being the TC method that ETA uses, I cannot…
From a paywalled WSJ article, key points:
"Pilots, aviation-industry officials and regulators said spoofed Global Positioning System signals are spreading beyond active conflict zones near Ukraine and the Middle East"
"Pilots have repo…
Continue reading
Source Plus9Time GSDB
What’s in current production are thus:
…
Starting from the caliber lists shared by @Plus 9Time (here and here), I am constructing what I hope will eventually become a complete list of Citizen’s thermocompensated (TC) quartz movements up to the year 2019, along with an accurate narrative of how they…
NYTimes:
A small but growing movement of ankle-watch acolytes has been afoot for a couple of years, as various users of A…
