No, this is not about 22-year old Moser Schaffhausen AG, which styles itself ‘H. Moser & Cie.’ after the 19th century watchmaker.
Thomas F. Moser died about two weeks ago, self-taught maker of chairs for presidents and popes, founder of Thos. Moser Furniture, author. (Non-paywalled…
This late 80s Motorola ad shows a U.S. Army SCR-536 ‘Handie Talkie’. It was indeed the ancestor to today’s mobile phones, entering wartime duty around 1941 with a short range of around a mile.
Less photogenically but even more important to the war effort, Motorola made a longer-range unit for the company level, the backpack-like SCR-300-A ‘Walkie Talkie’:
(as well as vehicle-mounted…
There have been three major approaches to improving quartz accuracy:
1) use a thermally insensitive XO
2) control the frequency of the XO by varying the capacitance of the oscillator circuit
3) arrange the circuit to divide the frequency of the XO by a…
What are your unanswered questions regarding HAQ watches?
Some of mine are:
1. Is 9F regulatable wirelessly?
2. What 9F regulating equipment is available in the main GS overseas service centers such as Mahwah NJ and Singapore?
3. What is the aging …
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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…
