That would be sunday midnight, GPS time, as GPS time-gears have GPS week
shift between saturday and sunday. This naturally makes Monday extra
monday as the system that fail do it during sunday.
Cheers,
Magnus
On 09/05/2016 06:29 AM, Mark Sims wrote:
I did a little math on the dates and it loo
There are cheap GC (gas chromatograph) ovens on eBay. They are
well-insulated and give you fast, precise temperature control. Some of
them are designed with a liquid nitrogen input for cooling. Otherwise,
you can use dry ice. I saw one mentioned on one of the mailing lists I
read, maybe this
You don't need exact control of the temperature. You just need a slow rate
of change and the ability to measure the temperature accurately.
I have used a picnic cooler with some water in the bottom and a very small
fish tank heater. But this was for an experiment in a home biology lab not
an ele
Glenn -
These outdoor GPS antennas are PLENTIFUL via surplus. Launch3, which offered
NOS Symmetricom surplus antennas to this group 12 months ago, are now selling
these surplus Ericsson KRE units (eBay).
The H inside a hexagon is the corporate logo for Huber-Suhner.
Huber is a Swiss HQ company
Rick,
I'm going from memory here. My former business partner (now deceased) had
a "beer fridge" setup as an environmental chamber for our instruments. The
trick for stability was to run the AC compressor all the time, and push
against it with heat lamps. The lamps were controlled with an Omega
rich...@karlquist.com said:
> I thought I would check the brain trust here to see if anyone has seen a
> hobbyist grade temperature testing chamber or kit or homebrew design. I
> have some crystals, oscillators, and other electronics I would like to
> characterize over temperature. I know this r
As with most things here - it depends.
I have a converted wine cooler I use for some things. Bought it for $20
at a flea market. It had blow a fuse on the power supply. This appears
to be a common failure. Won't handle much thermal load, but it's a
Peltier unit, so it will heat as well if wired c
On 9/5/16 8:52 PM, Scott Stobbe wrote:
The bargain price mini coolers are often peltier cooled, they appear to
fall under the marketing term "thermoelectric mini-fridge". I can't think
of a project name, but I'm sure I've seen this done before using a mini
fridge.
https://www.amazon.com/AGPtek
On 9/5/16 7:48 PM, Richard (Rick) Karlquist wrote:
As we all know, step #1 in making a clock is NOT
to build a thermometer :-)
I thought I would check the brain trust here to see
if anyone has seen a hobbyist grade temperature
testing chamber or kit or homebrew design. I
have some crystals, osc
The bargain price mini coolers are often peltier cooled, they appear to
fall under the marketing term "thermoelectric mini-fridge". I can't think
of a project name, but I'm sure I've seen this done before using a mini
fridge.
On Monday, 5 September 2016, Richard (Rick) Karlquist
wrote:
> As we a
Better stock up on 60W bulbs. They are becoming outlawed.
(Only kidding, a resistor works as well.)
Also, a foam drink cooler will give a more stable temperature. You can make it
leak a bit of heat to get the thermostat to cycle. The hard part is the
thermostat; they aren't cheap - even the lo
Yo Richard!
On Mon, 5 Sep 2016 19:48:14 -0700
"Richard (Rick) Karlquist" wrote:
> I thought I would check the brain trust here to see
> if anyone has seen a hobbyist grade temperature
> testing chamber or kit or homebrew design.
When I did this for testing labs, I took a cardboard box, a 60w
in
It's a Huber Suhner.
Chris
> On Sep 5, 2016, at 21:26, Glenn Little WB4UIV
> wrote:
>
> Pete,
>
> I do not know if I can send a picture to the mailing list.
>
> I am sending this to you and the list.
>
> The antenna is 4 inches from tip of cone to bottom of type-N connector.
> It is 2 5/8"
As we all know, step #1 in making a clock is NOT
to build a thermometer :-)
I thought I would check the brain trust here to see
if anyone has seen a hobbyist grade temperature
testing chamber or kit or homebrew design. I
have some crystals, oscillators, and other
electronics I would like to char
glennmaill...@bellsouth.net said:
> Is there a fix for the rollover problem for this instrument short of
> replacing the receiver? In searching the archives, this is the only
> solution that I see.
Sometimes, you can patch the downstream code to work around the bug. It's
only a few lines of co
Fake connections? Isn't a redundant system supposed to allow one box to
be disconnected?
Bill Hawkins
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob
Camp
Sent: Monday, September 05, 2016 8:20 PM
To: Discussion of precise time and frequency measure
Hi
If you only have one box, you need to be sure the “fake” connections on the
interconnect
are correct. If they are not, you will not get it to operate correctly.
There also is a survey process if you have not had it running in your location
before. That
could take a few hours to a few days
Hi,
I managed to get one of these Lucent boxes from a local ham that moved away a
couple years back.
I finally got around to modifying it today with Skip Withrow's mod to add 10
MHz output.
I connected an antenna and after a few minutes the yellow and No GPS and Fault
LEDs go out and the gre
Hi
Simple answer on all of this stuff:
Once you hit rollover, you either ignore it or start replacing hardware.
The companies that make this stuff stopped supporting firmware upgrades for the
gear
we now have a long time ago. That is one of the reasons we now can buy it cheap
Even
when upgra
Am 01.09.2016 um 06:56 schrieb Gerhard Hoffmann:
Am 01.09.2016 um 05:35 schrieb Charles Steinmetz:
The suggestion to use LT3042s is a good one, but note that it has an
output current rating of 200mA. The Tbolt needs ~250mA at +5v, and
~700mA at +12v [at startup -- but only ~150mA steady-stat
Nemko is the Norwegian "UL", my guess is the numbers are the
test/certification numbers. A picture would help
-pete
On Mon, Sep 5, 2016 at 5:14 PM, Glenn Little WB4UIV <
glennmaill...@bellsouth.net> wrote:
> At the last hamfest that I attended, I bought an antenna that looks like a
> GPS antenna
Is there a fix for the rollover problem for this instrument short of
replacing the receiver? In searching the archives, this is the only
solution that I see.
Thanks
73
Glenn
WB4UIV
--
---
Glenn LittleARRL Techni
At the last hamfest that I attended, I bought an antenna that looks like
a GPS antenna.
The price was right.
This is a Nemko Article number: 84097323, Type number 1315.17.0018.
It has a manufacturing date of 09/2012.
Can anyone tell me if this is in fact a GPS antenna and what voltage
wold be re
hol...@hotmail.com said:
> I did a little math on the dates and it looks like the rollover happened in
> the last couple of days...
Thanks for the heads up.
Mine started on Aug 17th
/var/log/ntp/clockstats.20160817:57617 2.033 127.127.26.1
T21997010102300103
8 64 0
That's from ntpd's cl
Hi
The rollover is in the GPS module firmware. If you dig into it, they didn't
quite update the firmware once every 3 months, but almost that often. Each
manufacturer latched onto various versions as they sailed by. None of them had
a validation process that could keep up with 4 releases a year
On 9/4/2016 10:48 PM, Mark Sims wrote:
Sometime (I didn't have it connected) in the last couple of weeks
my Z3801A went into gps week rollover.
If you have a Z3801A that had been working properly you might want to
check yours. Different firmware versions roll over at different
times.
My Z380
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