Just to get this data on the list.
Here are the measured voltages on U1:
Pin Fn Voltage Limits
9Beam I0.0011.01 to 3.73
18 Ion Pump E2.4361.72 to 3.01
7Ion Pump I0.0200
I won't be available when this is live. Do you know if the video will be
available afterwards?
Joe Gray
W5JG
On Wed, Oct 2, 2013 at 9:26 AM, Dr. David Kirkby wrote:
> I got sent an email about a Webinar, which is free (I like that!!!) on
> next Wednesday (Oct 9th).
>
> http://mwrf.com/webinar
Count me on the list of interest. I just know I will run across one at the
MIT flea. ;-)
But its been odd through the years that I have obtained a manual first and
magically at some point a unit. Numbers of time actually.
Regards
Paul.
On Wed, Oct 2, 2013 at 2:00 PM, Tom Knox wrote:
>
> If anyo
Hi
Any "real" watch or clock depends very much on things averaging out. If you
look at a 5 second a year watch, it might be off by a second or two a week in
some weeks….
Bob
On Oct 2, 2013, at 1:19 PM, Tim Shoppa wrote:
> You are correct, I observe that several of my circa $100 non-WWVB quar
If anyone has a service manual I am also very interested. Thanks
Thomas Knox
> From: tmil...@skylinenet.net
> To: time-nuts@febo.com
> Date: Wed, 2 Oct 2013 13:22:45 -0400
> Subject: Re: [time-nuts] FTS 4060 Cesium Time & Frequency Standard, Datum
>
> Hello Corby,
>
> Thanks for the help. Yes
Hello Corby,
Thanks for the help. Yes, could you copy me on the information for the U1
chip? I do not have anything other than the user manual from Brooke. At this
time, anything will be a great help.
Best regards,
Tom
- Original Message -
From:
To:
Sent: Wednesday, October 02,
You are correct, I observe that several of my circa $100 non-WWVB quartz
watches are good to 5 secs a year.
That 5 sec a year if I do my math right... is 1.6e-7, which is only a
little worse than the spec of the ovened HP10811 (1e-7). Now under my
typical use there is a 98.6 degree F oven right ne
Hi guys,
I am going to pull it apart this weekend and do some more exploring. Hope to
get some pictures for reference.
I think I will make up some extender cables so I can operate the CBT
assembly away from the main chassis. That should make things a bit easier to
look at.
Thanks,
Tom
--
Tom,
On the 4060 you can easily monitor the Ion pump voltage and current, the
electron multiplier voltage, and other important parameters by measuring
the voltages on the U1 chip on the uP board.
This saves you fronm having to diconnect stuff to measure the HV and
such.
If you don't have a manual
Even if the spec is exaggerated, What do you expect the real world
spec to be? Current TC watches are hard pressed to average under
5s/y.
Ronald
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I got sent an email about a Webinar, which is free (I like that!!!) on
next Wednesday (Oct 9th).
http://mwrf.com/webinar/webcast-phase-noise-jitter-measurements
I'm not sure how useful it will be, but might be worth a look.
Dave
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Dave,
I think that is the point. Until someone spoils it and brings the Symmetricom
spec sheet and proves that wwvb watches are actually more accurate over some
months :)
Now it would have been truly impressive if they had actually taken the csac
itself apart and re-assembled it to be say half
Tom,
I defer to Bert on these issues. He is the one that shepherded me through
the learning curve about the HP units.
I have a couple of HP 5061A's with FTS tubes and I agree with Bert that they
seem to 'work better' than the HP tubes. However, I would think that the
ion pump current would at l
Thanks Bert as I say I am no expert on the FTS. Also I was surprised to see
that they seem to sell at quite reasonable prices like $3K.
There is a site nixxiebunnie that has several nice internal pix. The bottom
pix shows the low V supplies and voltages thats printed on the supplies.
Good place to
Your observations are tru for HP tubes but not FTS. I see FTS tubes after 2
years pump down in 20 minutes.
Bert Kehren
In a message dated 10/2/2013 9:17:07 A.M. Eastern Daylight Time,
paulsw...@gmail.com writes:
Boy is this good advice thats why I turn Frankenstein 9$125 flea market
speci
Boy is this good advice thats why I turn Frankenstein 9$125 flea market
special)on every quarter check that it works etc. The ion pump being 0 is
the place to start looking as Joe says 0 is very very hard to believe in
the types of C units we get. Usually they have gas and the needle pegs or
is qui
On 1 October 2013 23:59, wrote:
> Guys,
>
> there is only one problem: there is just no way they can claim only 1
> second error in a 1000 years unless they also have a GPS receiver for
> calibration in there, which kind of mutes the point as that has been done
> using wwvb
> etc. Let's do the
Hi
Welcome to the reason a lot of us don't have running Cs standards.
There is a very basic wear out mechanism with Cs. Once it's moved from one end
of the tube to the other, the tube is dead. There is no practical way to
rebuild the tubes. Running one will simply wear out the tube. They are a
That stem on the watch (watch-box?) will be broken within a day, so who
cares on whether it is accurate for 1000 years?
On Tue, Oct 1, 2013 at 1:23 PM, Joseph Gray wrote:
>
> http://www.ablogtowatch.com/bathys-hawaii-cesium-133-atomic-wrist-watch-accurate-second-1000-years/
>
> But will TVB buy
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