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
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
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
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
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
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*
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
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
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
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
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"
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
>
> 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
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