[time-nuts] HP-531xx calibrator nearing completion

2017-09-07 Thread Mark Sims
I finally got in my BNC connectors and 2P6T rotary switches and have the circuit board for the HP-531xx frequency counter calibrator just about finished. This board lets you fully calibrate the HP-531xx counters including the "fine" time interval calibration and the channel gains. The basic

[time-nuts] 5061A behavior

2017-09-07 Thread Bob Bownes
So I powered up my trusty 5061A a week or two ago and it's been doing something interesting. Twice now, the CA lamp has gone out, but the alarm lamp has not lit. Resetting the logic brings it right back, but this seems like an improper failure mode. The alarm lamp is fine, so that's not the

Re: [time-nuts] Very large X9.2 solar flare.

2017-09-07 Thread Alan Melia
They mostly do but the flare is over in minutes and the CME is not visible except in any auroral effects unless you run a magnetometer.yes that does take 2 days to get here so we get a warning. We are continually seeing reports that flares affect the power lines and there is no

Re: [time-nuts] Very large X9.2 solar flare.

2017-09-07 Thread Clint Jay
It's been interesting watching the various web SDRs the afternoon and seeing the HF bands go silent. They were recovering a short while ago but I will keep a corner of my eye on them for the rest of the day On 7 Sep 2017 5:57 pm, "jimlux" wrote: > On 9/7/17 8:35 AM, David

Re: [time-nuts] Very large X9.2 solar flare.

2017-09-07 Thread jimlux
On 9/7/17 8:35 AM, David G. McGaw wrote: No, the flare also produced a CME, which is expected to reach us tomorrow and may (hopefully?) trigger a G-3 class geomagnetic storm. http://www.spaceweather.com/archive.php?view=1=07=09=2017 Oh ho, ANOTHER CME... why we're just seeing bunches of them

Re: [time-nuts] Bulova crystal oscillator

2017-09-07 Thread Bob kb8tq
Hi The real fun was building those ovens, at least for the “precision” versions: The thermostatic switches came in with a fairly loose tolerance on them. First step was to play with a bunch of water baths to sort them out. If you wanted something like a 0.5 C tolerance that would take a *long*

Re: [time-nuts] Bulova crystal oscillator

2017-09-07 Thread Magnus Danielson
Hi, I saw something very similar, and it had a bi-metal regulator. Simple and effective for its time, but not very good if you care about better performance, as bang-bang regulation of slow rate isn't as good as the same crystal could do with a more linear regulation. Never the less, it's

Re: [time-nuts] Very large X9.2 solar flare.

2017-09-07 Thread David G. McGaw
No, the flare also produced a CME, which is expected to reach us tomorrow and may (hopefully?) trigger a G-3 class geomagnetic storm. http://www.spaceweather.com/archive.php?view=1=07=09=2017 David N1HAC Dartmouth College Dept. of Physics and Astronomy Space Physics Group (Yes, I am a rocket

Re: [time-nuts] Bulova crystal oscillator

2017-09-07 Thread Bob kb8tq
Hi The 115VAC power suggests that it dates back a ways. The 100KC frequency suggests the same thing. It could easily be a 100 KHz crystal in a simple thermostat controlled oven. In that case, the stability would not be anything super duper. Your guess of 0.001 Hz gives a 1x10^-8 sort of

Re: [time-nuts] Very large X9.2 solar flare.

2017-09-07 Thread jimlux
On 9/6/17 2:46 PM, David G. McGaw wrote: It also produced a CME. Read the note on spaceweather.com. David N1HAC On 9/6/17 5:19 PM, Alan Melia wrote: The flare has been and gone!...is this another case of journalists mixing up a flare with a CME ? Alan G3NYK CME was earlier this

Re: [time-nuts] Very large X9.2 solar flare.

2017-09-07 Thread David G. McGaw
It also produced a CME. Read the note on spaceweather.com. David N1HAC On 9/6/17 5:19 PM, Alan Melia wrote: The flare has been and gone!...is this another case of journalists mixing up a flare with a CME ? Alan G3NYK - Original Message - From: "Mark Sims"

Re: [time-nuts] Very large X9.2 solar flare.

2017-09-07 Thread Mike Cook
When I saw the OP I did a quick check of my GPS receivers status. One of them, a Jackson Labs M2M replacement (actually a U-blox M8T) had just reset and gone to a 111ms offset. Was that due to the CME? Was it one of Murphy’s laws « Looking for problems actually creates them » ? Or a result of

Re: [time-nuts] Very large X9.2 solar flare.

2017-09-07 Thread Andy
> > The flare has been and gone!...is this another case of journalists > mixing up a flare with a CME ? > There was some of both. SDO saw a flare, STEREO saw a CME. Andy ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to