[time-nuts] Vectron Crystal Oscillator

Hello I am looking for data on a Vectron 10 Mhz osc. Model 271-2996 P/N 447-581 Cheers Earl VE7ZES ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the

Re: [time-nuts] Seeking HP 3561A schematic diagrams

Hi Charles, an original manual is listed on ebay. There are pdf's available for less money. I don't know of any free downloads of Vol.2. The 3048A system is running with a standard 3561A. Cheers, Adrian Charles Steinmetz schrieb: > I'm helping a colleague resurrect a hard-luck HP 3048A phase

Re: [time-nuts] Calibration procedures - what is normal?

I have to say, I'm hugely impressed by the Aeroflex 3413 I've bought and Cobham's customer service response has so far been excellent but I suspect it will be far too expensive for me to buy repair parts which is a shame. On 13 Feb 2016 09:14, "Dave Brown" wrote: > Cobham

Re: [time-nuts] LIGO detects gravitational waves

I've been wondering if this would ever happen in our lifetime. The detector is good but still it requires such a huge and rare event to be detectable as two black holes crashing into each other. How often does that happen? Are black hole ever formed in pairs, if not a crash would be very

Re: [time-nuts] LIGO detects gravitational waves

Tom, Thank you for the heads up. I was most impressed by the amount of correlation work or should I say anti-correlation to remove all possible sources of noise contamination. Googling LIGO Hanforg or LIGO Livingston lets us see the instruments directly. Thanks, Dale Cannon

Re: [time-nuts] LIGO detects gravitational waves

Hi Chris, With a single event it's hard to know if luck was involved. But since the recent upgrades, LIGO is much more sensitive than it was years ago -- so detecting something this time was maybe not unexpected. Still, much of all this is unknown which is why gravity wave (GW) research is so

Re: [time-nuts] LIGO detects gravitational waves

> How much of a shift did they actually see in their 2.5 mile long laser paths? > > The news article I saw talked about a distance change of “1/10, the size > of a proton”. That didn’t seem to make much sense. > > Bob Hi Bob, The unit of measurement that gravity wave folks use is "strain"

Re: [time-nuts] LIGO detects gravitational waves

I watched the video. It’s a spectacular discovery, no doubt. But the next day, the headlines in the non-technical press were all about how we can now “hear” the universe. The parlor trick the scientists did for the press conference was what lead the news. I don’t know which side the face-palm

Re: [time-nuts] Calibration procedures - what is normal?

Hi, I had an interesting experience with a local cal lab when I took in my HP 5334B (Option 010). I'd recently purchased the unit and had no idea of its calibration history. At the time I wasn't quite a time nut, and I didn't own a reference to check frequency accuracy myself. I was hoping to get

Re: [time-nuts] Calibration procedures - what is normal?

Cobham is a UK based defence and high end security supplier- originally formed (not too many years ago) by their buying out of several other companies in their lines of business. More recently they have got into aerospace activities. As you might expect, they supply some rather expensive and

Re: [time-nuts] LIGO detects gravitational waves

If it were possible for time nuts to measure time differences to 10E-21, could they have seen the effects of the gravity wave? Bill Hawkins ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to

Re: [time-nuts] LIGO detects gravitational waves

Hi Tom, Thanks for posting this. I'm looking at the timelab plot, and the only thing I can relate that to is a musical note played backward. IOW, the decay seems backwards to me. Bob - AE6RV On Sat, 2/13/16, Tom Van Baak

Re: [time-nuts] LIGO detects gravitational waves

Hi Nick, The time series, the frequency spectra, and the audio representation were all fantastic. IR / optical / x-ray telescopes receive photons so it's natural to think of your eye. But gravity waves are essentially a displacement so technically "ears" are better suited than "eyes" for this.

Re: [time-nuts] LIGO detects gravitational waves

Hi Ok so checking the math to make sure I’ve got it. They start with a path that is (in effect) 1600 KM long. That’s 1.6x10^6 meters. They resolve something that is in the 1x10^-23 range. That would be 1x10^-17 meters. Wikipedia confirms that a proton is at 0.87x10^-15 meters. The resolution

Re: [time-nuts] LIGO detects gravitational waves

Hi Bill, I don't think so; time and space are not related that way. Perhaps what you're thinking is that changes in gravity make changes in time, as in gravitational time dilation, or solid earth tides? The numbers are not favorable: On earth, a 1 meter change in elevation causes a frequency

Re: [time-nuts] LIGO detects gravitational waves

t...@leapsecond.com said: > It's not just black holes (BH) but also neutron stars (NS) If anybody is interested in neutron stars, the SLAC public lecture a few weeks ago was very good. Supernovas: Gravity-powered Neutrino Bombs

Re: [time-nuts] LIGO detects gravitational waves

In message <1E75A9592178425ABD11390EB725D060@pc52>, "Tom Van Baak" writes: >Yes, the interferometer is 4 km in length but they bounce the beam back >and forth 400 times so the effective length is more like 1600 km. They >keep the mirrors stationary to "picometers". They use hundreds of

Re: [time-nuts] LIGO detects gravitational waves

IMHO, the decay seems backwards because we are watching the growth of the event as the black holes approach each other, reaching a maximum at collision. Don't know why the signal drops off after the collision. May be because gravity stops changing, or maybe because the resulting object left the

Re: [time-nuts] LIGO detects gravitational waves

Bill, The signal drops off because what was once two separate rapidly accelerating orbiting binary black holes has now merged into fat one. They talk of inspiral, merger and ringdown phases. There's a 1 minute video http://www.ligo.org/science/Publication-NINJA2/ that shows this nicely. To

Re: [time-nuts] LIGO detects gravitational waves

Hi At least my simple take on it: As they get closer, the rotation speeds up. It is no different than the ice skater pulling in their arms. Once they get close enough, there are no longer two black holes. They have become a single black hole. They now radiate a “dc signal” that the

Re: [time-nuts] LIGO detects gravitational waves

Bill, As the two holes collapses into one larger hole, the rotation energy goes from being a two-body rotation into being a one-body rotation. The one-body rotation does not have the same characteristic as a massive body moving swiftly back and forward from our observation and thus producing

Re: [time-nuts] Trimble Thunderbolt error

Hi The first question would be: where on earth are you? Next up would be are there any test ranges nearby? Bob > On Feb 13, 2016, at 8:34 PM, Rob S. wrote: > > > > Hello Group, > > A friend about 2Km up the road from me and I both run the Trimble > Thunderbolt GPSDO.

[time-nuts] Trimble Thunderbolt error

Hello Group, A friend about 2Km up the road from me and I both run the Trimble Thunderbolt GPSDO. For a few years now they have both worked flawlessly. Around 1/2 an hour ago ( I wasn't in front of mine when it happened ) at roughly 00:45 UTC the Mates went into "holdover" mode and reported

Re: [time-nuts] LIGO detects gravitational waves

The ring-down is due to the combined BH ringing down from oblate to spherical and rotateing while ringing. The wave contains most of the lost mass/energy. There likely was also EM energy radiated from the surrounding BH disks, but not observed here. Bill\ NL7F On Sat, 13 Feb 2016 17:34:45

Re: [time-nuts] Trimble Thunderbolt error

At 07:34 PM 2/13/2016, Rob S. wrote: Content-Transfer-Encoding: 7bit Hello Group, A friend about 2Km up the road from me and I both run the Trimble Thunderbolt GPSDO. For a few years now they have both worked flawlessly. Around 1/2 an hour ago ( I wasn't in front of mine when it happened )

Re: [time-nuts] Trimble Thunderbolt error

Not sure if it’s locale based, but for reference, my unit seems to be operating normally here in Washington state, USA. Nigel > On Feb 13, 2016, at 17:34, Rob S. wrote: > > > > Hello Group, > > A friend about 2Km up the road from me and I both run the Trimble >

Re: [time-nuts] Trimble Thunderbolt error

Hello again Group, Just an update, I let the Trimble sit for a for an hour or so and it's status didn't change so I initiated a "Survey" and it is now back to normal "seeing" satellites and has switched back into over detect mode. I don't log the Trimble so I'm not sure what happened,

Re: [time-nuts] Trimble Thunderbolt error

Hi Bob, about 100 Km South East of Melbourne AU in the sticks and no, no test ranges nearby... Rob. On 2016-02-14 14:45, Bob Camp wrote: > Hi > > The first question would be: where on earth are you? Next up would be > are there any test ranges nearby? > > Bob > >> On Feb 13, 2016,

[time-nuts] Trimble Thunderbolt error

Yes, all satellites dropped out from 00:16:51 to 01:54:02 UTC in Dallas, Texas. Was tracking 5 sats then, poof, none.Global warming? Gravity waves? More bogus GPS control segment uploads? Somebody gots some 'splain to do...