Allowed range of the 60Hz mains frequency

It has a small tuned loopstick antenna.

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Reply to
Michael A. Terrell
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Isn't it obvious that their recommendations would change? Otherwise why would they make the change? I'd be surprised if adding PM caused your generic AM clocks to stop working. Do you have high end devices that coherently demodulate the AM signal? Florida is about as far as you can get from Boulder, CO within the 48, so it doesn't surprise me you have trouble picking up the signal.

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Rick C
Reply to
rickman

rickman wrote on 8/12/2017 9:29 PM:

Actually, it's not technically a TCXO. Most of them do digital adjustments to the timing chain that derives the time, not to the oscillator itself. I did find one device that adjusts the capacitance on the crystal so the actual 32.768 kHz changes and *that* would be a TCXO.

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Rick C
Reply to
rickman

You don't get it do you? The human body doesn't extend temperature control to the skin much less to a metal object attached to the skin.

You have no real information to show the effect is other than secondary. I've seen a watch that reported an accurate air temperature with a sensor buried inside the watch. This is done.

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Rick C
Reply to
rickman

They worked fine, until the new equipment was switched on. The PM signal is wider than the one Hz AM signal was.

The clock in this room is showing a full scale signal.

Florida is mostly flat, so there is little signal shading. The improvements were intended to make WWVB stronger in the SE United States.

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Reply to
Michael A. Terrell

Yes, you'll never understand that 'Air Temperature' isn't measured from the guts or the rear of the watch, it is just processed on the tiny PCB. The metal rear of the watch is in contact with your wrist. Unless you have horrible circulation, its temperature is fairly constant.

My watch used to drift in cold weather, until I started wearing it around the clock.

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Reply to
Michael A. Terrell

You seem to know very little about physiology. If your skin temperature were not a function of air temperature and insolation as well as the level of exercise, they wouldn't need to stick things in your mouth or ear to take a temperature. Do a little reading and learn something. Then you might learn that the temperature of the sensor in the watch is as much a function of the air as anything, same for the crystal in the oscillator.

"If it's not too cold, our bodies adapt to cold temperatures pretty well. When we encounter cold air or water, the lacy network of blood vessels in the skin constricts, and blood is hastily shunted to the interior. That response adds to the insulating power of the skin because there's less heat lost from blood circulating near the surface."

"When temperatures rise, the body reacts by increasing blood flow to the skin's surface, taking the heat from within the body to the surface."

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Rick C
Reply to
rickman

Wider how? Wider in frequency? Yes, when you invert the phase periodically that uses bandwidth. How is that relevant? I seriously doubt your receiver has too narrow of a bandwidth. It is hard to do with conventional filters.

But it won't decode the time signal? Sounds like it is picking up interference.

The improvements to the modulation do not make the WWVB signal stronger anywhere and do nothing to improve reception by AM demodulation. To improve reception requires demodulation of the phase signal. Or are you talking about the various changes they've made to the antenna, etc over the years?

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Rick C
Reply to
rickman

Define "small". If the whole NE power grid went down it would try to pull the power through those "small" ties. That would pull down the next grid.

Bill

Reply to
Bill Gill

No, the tie would drop before it allowed the other side to fail. This information is online, if you choose to learn something.

Reply to
krw

Until they cut the tie preventing that grid from failing as well...

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Rick C
Reply to
rickman

Roger that. There was a huge draw down when the NE grid failed.

Bill

Reply to
Bill Gill

They're not going to let the grid slow by "several minutes" before that tie gets cut. That's the point.

Reply to
krw

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