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#1 2018-01-10 19:35:56 - Super-high-frequency / high accuracy quartz watches

AndreWhere (605)
Member
From: Dunwoody, GA
Registered: 2017-08-24
Posts: 5,178

Super-high-frequency / high accuracy quartz watches

These are pretty rare, mostly falling under the Bulova Precisionist brand. I've grown very interested in them.

A typical quartz watch uses an oscillator that vibrates at a rate of 32,768 beats per second. That's 2 to the 15th power, and it's a very common number in digital electronics and computer science. It was selected in watches because it's just high enough that people can't hear the crystal vibrating.

Greater accuracy can be achieved in a couple of ways. Any crystal rated at a nominal 32,768 hertz will have a certain margin of error; manufacturers can buy crystals that are rated to be within 0.1% of their nominal rating, 0.05%, etc.

That affects accuracy. The closer the producer of the crystal warrants it to be to 32,768 hertz, the better the watch will be. Swiss quartz movements typically use 32,768 hertz crystals that are very close to their nominal ratings.

Another way to increase accuracy is to go beyond 32,768 hertz. The Precisionist line uses a 262,144 hertz (i.e. 2 to the 18th power) crystal. A 0.05% error, for example, will have less impact on accuracy at 262,144 hertz than at 32,768 hertz.

I have had my eyes on a Precisionist or something similar for a few years now. Up until now, I'd had a hard time finding one I liked. But there are some nice-looking examples out there now.

I like this one except for the goofy lock-down mechanism on the bezel:

A1zQRhioovL._UY500_.jpg

Why not just offer a standard unidirectional bezel? Seems overly cute to me.

This Precisionist is pretty much beyond reproach, though:

98B295_grande.jpg?v=1479742907

The only real criticism I have is those four hex nuts.


Bring back Reed V. "Pie" TurkPalmer Eustachy.

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#2 2018-01-10 20:06:22 - Super-high-frequency / high accuracy quartz watches

USMstang (230)
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From: 7 miles North of Cat Island
Registered: 2017-08-25
Posts: 937

Re: Super-high-frequency / high accuracy quartz watches

Those hex nuts are the only thing wrong with that watch.  And that damn lockdown is stupid up top.

Very interesting on the hertz level (bad ass math).

Last edited by USMstang (2018-01-10 20:07:26)


Still sleeping with a Dixie Darling!

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#3 2018-01-10 20:09:23 - Super-high-frequency / high accuracy quartz watches

USMstang (230)
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From: 7 miles North of Cat Island
Registered: 2017-08-25
Posts: 937

Re: Super-high-frequency / high accuracy quartz watches

So do animals such as dogs hear the crystal movement?  Now I'm going to look up the hearing range of deer as well.  roll

So deer can hear just into that range but luckily, high waves are too short and would have to be really loud to travel very far.

Last edited by USMstang (2018-01-10 20:21:16)


Still sleeping with a Dixie Darling!

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#4 2018-01-11 20:51:25 - Super-high-frequency / high accuracy quartz watches

AndreWhere (605)
Member
From: Dunwoody, GA
Registered: 2017-08-24
Posts: 5,178

Re: Super-high-frequency / high accuracy quartz watches

USMstang wrote:

So do animals such as dogs hear the crystal movement?  Now I'm going to look up the hearing range of deer as well.  roll

So deer can hear just into that range but luckily, high waves are too short and would have to be really loud to travel very far.

I wondered the same thing. Supposedly children can hear higher frequencies than adults, but I've never had a sullen teenager bitch about my quartz wristwatch.


Bring back Reed V. "Pie" TurkPalmer Eustachy.

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#5 2018-01-11 21:24:17 - Super-high-frequency / high accuracy quartz watches

USMstang (230)
Member
From: 7 miles North of Cat Island
Registered: 2017-08-25
Posts: 937

Re: Super-high-frequency / high accuracy quartz watches

I often feel for my dog and wonder how many household appliances are driving her crazy.  I know I can hear annoying high pitch shit and its not ringing in my ears.


Still sleeping with a Dixie Darling!

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