Home |
Search |
Today's Posts |
#8
![]() |
|||
|
|||
![]()
On Sat, 25 Aug 2018, Frank wrote:
The "TRUMP" administration's planned elimination of WWV/WWVH popped up on NPR's Weekend Edition. Scott Simon interviewed Tom Witherspoon of the SWLing Post. Witherspoon said, as the bill is written, ALL of the time stations are scheduled to be gone. A spokesman for clockmaker LaCrosse said he believed that Congress would not pass a bill which killed the time sync for 50 million clocks. Here's the link to Weekend Edition: https://www.npr.org/programs/weekend...august-25-2018 Scroll down to: What Closing A Government Radio Station Would Mean For Your Clocks As a foreigner, it's hard to follow this. What I thought was going on was that the US government told NIST they have to cut some things, so this is what the NIST decided wasn't "valuable". But it's propagated badly. One site says WWV/WWVH, and others include WWVB, while other sites say "WWVB seems to be not included". I think WWVB wasn't mentioned by name in the original document (I haven't read it all), but is done because it does mention self setting clocks in some way. ANd the problem is that while WWV and WWVH mean a lot to radio hobbyists, reality is that a lot of the purpose of those stations, nostalgia aside, have been replaced by other things. Even in 1971, when Heathkit introduced its first frequency counter, they suggested that the crystal time base could be beated against a local broadcast station to get it "right on". There can be disadvantages to that, WWV would leave some space in the minute with only ticks to make beating easier, but surely nowadays local AM broadcast stations are even more accurately on frequency than fifty years ago. But WWVB, kind of hidden in all this, is used by endless consumer clocks. I can remember when there were projects in the hobby magazines to make use of WWVB, mostly as a frequency standard, and then at some ponit 20 or maybe 30 years ago, suddenly lots of consumer clocks that used it to set their time, and they just kept getting cheaper. I paid about $20 ten years ago for my Casio Waveceptor watch, and it's useful in multiple countries, not just the US. Not only are those common, but just a few years ago NIST added a second modulation scheme, to improve the station's useage in "fringe" areas, though you needed a new clock to make use of that second modulation scheme. At that point, they said that WWVB is no longer seen as a frequency standard, but exists for the purpose of setting all those clocks in consumer use. But it's been vague and depending on how you look at it, maybe WWVB isn't included, while from another angle, the fact that it's not specifically mentioned either means ignoring the most important part of this cutback, or an indicator that it's not included. I've seen followup messages saying "oops, we checked with NIST and WWVB is included". But if you check google, this is not a mainstream story. It's a radio hobbyist story, so the most important message may not be getting out. I mentioned that in a comment at Thomas's swling.com blog and he added anotehr post specifically dealing with WWVB, and presumably from that got on NPR. That is still the most mainstream place that's covering this story. I realize most people don't need accurate time. But the funny thnig is, in "the old days" an average home would have a few clocks and some watches. But the move to digital meant endless things included clocks, the micorwave, the tv set, maybe that stereo system, the MP3 player, the computer and so on. The exact time doesn't matter, but suddenly instead of having a single clock in the house, you've got multiple clocks, and most of them aren't on the same time, either because setting them is too much trouble, or they drift badly. Which clock is "most right" in terms of time? If you had only one, you'd assume it was good enough, but once you have clocks everywhere, it nags at you. I think that's the context of WWVB clocks, it doesn't completely solve the problem until every clock is self setting, but it gives you one clock that is always "right". I ahve a few, and the Casio watch, and they always show the same time if they've been self-setting properly. This will take this away. Michael |
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
If CW is eliminated. | General | |||
If CW is eliminated. | Antenna | |||
If CW is eliminated. | Swap | |||
If CW is eliminated. | Policy | |||
VOA to be eliminated? | Shortwave |