place
for drafts - right below the air conditioning unit. I will look at moving
that.
Dave.
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkir...@kirkbymicrowave.co.uk
https://www.kirkbymicrowave.co.uk/
Telephone 01621-680100./ +44 1621 680100
Registered in England & Wales, company number
On Tue, 28 Jun 2022 at 20:04, Bob kb8tq via time-nuts <
time-nuts@lists.febo.com> wrote:
> Hi
>
> The “typical” 10811 struggles when shut down for a while. Once the oven
> is turned off, the boards are just sitting there in whatever environment
> your
> lab provides. Do they soak up humidity or
by this time, is it just pot luck? I think it's the latter, but
maybe some are double-ovens and some single.
With the exception of power cuts of up to a few hours, the HP 10811-60111 I
fitted has been continuously powered on for a few years. But due to soaring
power costs, I am going to switch my ovens of
On Fri, 10 Jun 2022 at 17:39, Lux, Jim via time-nuts <
time-nuts@lists.febo.com> wrote:
>
> On the subject of rapid warm up. I suppose if you had a need, one could
> dump as much power as you need into the heater. Turn on oscillator,
> lights in room dim for a few moments.
>
Is that not likely
.
To you guys in the USA or elsewhere, where places like NIST do not have
open-days, perhaps you can use the fact NPL does, to get your own national
metrology labs to have open-days.
Dr David Kirkby Ph.D
Email: drkir...@kirkbymicrowave.co.uk Web:
https://www.kirkbymicrowave.co.uk/
Kirkby Microwave Ltd
It looks like NPL are in the process of creating some courses on this.
Introduction to Time and Frequency Measurement
https://elearning.npl.co.uk/enrol/index.php?id=53
I think I read something on the NPL site to imply that was free, but I
can't see that now. Anyway, it's not available yet, but it
k
diamond, which is a form of carbon, is the best thermal conductor, and
around 5x better than copper.
Dave
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkir...@kirkbymicrowave.co.uk
https://www.kirkbymicrowave.co.uk/
Telephone 01621-680100./ +44 1621 680100
Registered in England & Wales, c
oubt an 18 s error is going to be significant, but I can reset
the time to UTC.
Dave.
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkir...@kirkbymicrowave.co.uk
https://www.kirkbymicrowave.co.uk/
Telephone 01621-680100./ +44 1621 680100
Registered in England & Wales, company number 08914892.
Reg
*16 -- --- MODE Hold
*11 -- --- *17 -- ---
*12 -- --- 30 71 148 LAT N 51:39:04.128
LON E 0:46:36.375
ELEV MASK 10 deg *attempting to track HGT +46.29 m
(MSL)
HEALTH MONITOR ...
Dr David Kirkby Ph.D C.Eng MIET
Email: drkir...@kirkbymicrowave.co.uk Web:
https://www.kirkbymicrowave.co.uk/
Kirkby Microwave Ltd (Tel 01621-680100 / +44 1621-680100)
Stokes Hall Lodge, Burnham Rd, Chelmsford, Essex, CM3 6DT.
On Sun, 28 Jun 2020 at 12:44, Tom Van Baak wrote:
> About sl
r texts).
>
> -aps
IIRC there are two profs and both had written text books on GPS.
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkir...@kirkbymicrowave.co.uk
https://www.kirkbymicrowave.co.uk/
Telephone 01621-680100./ +44 1621 680100
Registered in England & Wales, company number 0891489
a faster
serial port speed.
Lady Heather gets the time from the GPS receiver once, but then either
1) Windows reports the program is not responding.
2) The clock runs backwards.
I thought it might be worth trying different serial port settings.
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
dr
My HP 58503A is using the default 9600 8N1 for serial communication. It
would be nice to run the connection faster, and there are commands to
change the serial port speed, as well as reset the serial port settings to
the defaults. What concerns me is that if I try to run the serial port
faster,
the SI
units. I must have watched the video on that ten times before I was
confident I had a reasonably good understanding of that.
The 40 minutes for the exam was more than enough time.
Dave.
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkir...@kirkbymicrowave.co.uk
https
haps there’s is period over which the the overall stability can be
improved by adding a rubidium oscillator. I would be interested to know if
that is the case or not.
Dave
> --
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkir...@kirkbymicrowave.co.uk
https://www.kirkbymicrowave.co.uk/
Telephone 01621-
/incident_report_lfdd_-_summary_-_final.pdf
--
Dr. David Kirkby,
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and follow the instructions there.
it is usually possible to get
prices. Maybe its a case of “if you have to ask the price, then you can’t
afford it”
Dave
--
Dr. David Kirkby,
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nteresting to know if a resistor was
worth shipping powered up.
Dave.
--
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f it could run from a few NiMH cells for 48 hours, that would
give the option of shipping it. I don't know if that's going over the top,
but it would be an interesting exercise.
--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHEL
t should be stable over short time periods to allow it to be
used as a transfer standard. But I am seriously considering having another
attempt at this, but putting the resistor in an oven.
Dave.
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Dr. David Kirkby,
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time-nuts mailing list -- time-nuts@
On Tue, 11 Jun 2019 at 17:54, Dr. David Kirkby <
drkir...@kirkbymicrowave.co.uk> wrote:
> I'm located in Althorne, Essex (CM3 6DT). I'd like to get a couple of
> resistors (10 M and 100 M) measured on an 8.5 digit meter .
>
I apologise - I posted this to the time-n
the resistor on two meters reasonably close in time, should be
enough.
There are some issues with these data acquisition meters, which impacts
their stability. It does not help the fact that there's no S/N on it, so i
don't now if it has any particular fault.
--
Dr David Kirkby Ph.D C.Eng MIET
I notice a lot of 1 kg weights on eBay, so perhaps the same will happen
with Cs clocks!
I wonder what fraction of users of cesium clocks are using them because a
second is defined the way it currently is? I can’t imagine there will be
lots put on the used market, but it would be nice if there were.
h
of older manuals, for equipment one does not own, often bears useful
results.
--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD,
Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company num
On Sun, 3 Feb 2019, 19:03 Hi,
>
> Wanted to warn about the 5065A that has now sold twice on eBay. (Jan 18
> and Feb 2) When it first listed I contacted the seller and told him the
> optical unit was missing (A12) and he should not call it "fully
> functional" Anyway he sold it for his asking
the correct size.
Dave, G8WRB.
--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD,
Essex, CM3 6DT, United Kingdom.
Registered in England and Wales as company number 08914892
https://www.kirkbymicrowave.co.uk/
Tel 01621
hOn Fri, 9 Nov 2018, 13:49 George Atkinson via time-nuts <
time-nuts@lists.febo.com wrote:
> Hi Dave,
> Thanks for the info. I've already built the analogue supply and it's
> working fine. It's interesting that even that 55W supply is operating near
> it's -15V limit with the 58503A and the
On Thu, 8 Nov 2018, 14:53 George Atkinson via time-nuts <
time-nuts@lists.febo.com wrote:
> Last month I was at the UK “National” hamfest and in the flea market area
> a seller had a HP 58503B for sale. It was missing the cover and power
> supply (AC mains version)including mounting. However it
On Sun, 4 Nov 2018, 11:51 David C. Partridge FWIW it is trivial to modify these video distribution amps for 50 ohm
> output - you just need to change the output resistors form 75 ohm to 50 ohm
> on the board after the op-amp.
>
> David
>
Three was a discussion about the particular video amplifier
On Mon, 29 Oct 2018 at 09:43, Tom Van Baak wrote:
> David,
>
> Just to see if your setup is working:
>
> 1) Set the pulse generator to as fast a risetime as possible; ns or less.
> Use a low pulse rate (100 Hz is fine).
>
Unfortunately, I don't have such a pulse generator, so I can't run that
Hz reference, but I somewhat doubt that is the cause of these issues.
I must be missing something, but I'm not sure what it is.
--
Dr David Kirkby Ph.D C.Eng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD,
Essex, CM3 6DT, United K
On Tue, 4 Sep 2018, 18:35 John Sloan, wrote:
> Folks:
>
>
>
> Yesterday (2018-09-03) afternoon (about 22:00UTC, 16:00MDT) I noticed one
> of my three home-made GPS-disciplined NTP servers had lost its GPS lock.
> After some forensics on my part, this (2018-09-04) morning (about 16:00UTC,
>
ld be £12/pound.
When it comes to time (the subject of this list), I'm not sure where the UK
stands legally. I will ask on the newgroup uk.legal.moderated
https://groups.google.com/forum/#!forum/uk.legal.moderated
which is visited by solicitors, students of law, and people wanting legal
advic
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