I am a frequency nut, as opposed to a time nut. There may be some correlation
between the two subjects! 😄
I will be at Horror Arena this weekend, too. Would be fun to meet the gang.
Rob Sherwood
NC0B
Sent from my iPad
> On May 17, 2016, at 4:09 PM, Tom Holmes wrote:
>
>
>
> For some reaso
There is what looks like a decent carrier board for Ublox modules on
OSHPARK.COM's shared project library. It has a voltage regulator and RS-232
interface on it... would be nicer if it had a prototype area and swoopty PPS
driver, but I'm too lazy to lay out a better one. Three boards will cos
Hi guys,
This is the last call for the group buy of the Ublox LEA-6T modules. Just be
be sure you know what you're getting: these are new in package LEA-6T modules.
They are not on a breakout board of any type.
I have the following names and quantities. If your name is not on this list,
p
HI Bob...
Thanks for the tip. Have been down that road with this one and it didn't fix
it. I think someone may have deliberately disabled the internal timebase to
prevent users from having anything but the house standard in play.
Tom Holmes, N8ZM
-Original Message-
From: time-nuts [ma
The TV show is tomorrow, Wednesday evening. 8/9 PM, or something like that.
Here are fresh web pages with background information, photos, and plots:
http://leapsecond.com/great2016a/
http://leapsecond.com/great2016a/photos.htm
I have no idea how minor my role is in the actual TV episode, but if
List,
I Goofed.
The 2848A late model info is on is on Dider's site as a HP 105B "Supplement".
The HP *Supplement* instructions are: butcher a perfectly good earlier model
service manual add info here and delete info there, pencil in changes making
the original manual a piece of garbage.
They were
Search for 105B on Didier's site.There are 2 files that contain the relevant
schematics and change data for versions with10811A's. Although my 10811A
equipped HP105B variant appears to have the old power supply with MC1468's
rather than the later version using LM317's.
Bruce
On Wednesday
Hi,
Thanks to all who replied and made the lite in my brain go on.
Probably a great niche product but not for me.
Regards,
Perrier
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Hi,
Thanks for all the suggestions for the ski but I still have drawn a blank.
However I was able to get a large amount of similar data of of Dider's web site.
And thanks Charles for your phase noise postings. More for me to learn.
Regards,
Perrier
Does not have the basic internal timebase or doesn't have the OCXO timebase?
I have one in which I put an OCXO and required snipping/removing a
jumper on the main board to disconnect the onboard timebase.
Perhaps some where sold with OCXO only and never had an onboard timebase
on the main boa
On 5/17/16 4:07 PM, Magnus Danielson wrote:
Tom,
On 05/17/2016 02:02 PM, Tom Van Baak wrote:
The CSAC behaves like a gas cell device (similar to a Rubidium)
We do live in a “no free lunch” sort of world.
For measured ADEV of a CSAC (as well as no free lunch) see:
http://leapsecond.com/pag
Hi,
I know this is a for sale post, but there's a jumper that needs to be there to
work with the regulator oscillator. Page 2-4 of the Operating and Service
Manual (05335-90021) details the instructions for installing the Option 010,
the 10811 OCXO. Instruction "c" is below. You'd need to ad
Tom,
On 05/17/2016 02:02 PM, Tom Van Baak wrote:
The CSAC behaves like a gas cell device (similar to a Rubidium)
We do live in a “no free lunch” sort of world.
For measured ADEV of a CSAC (as well as no free lunch) see:
http://leapsecond.com/pages/csac/
Is this an illustration of a popul
For some reason it did not have an internal timebase when I got it, and
throws an error, UNLESS you have an external 10 MHz connected before you
turn it on. Then it works fine.
Please contact off list for details,
AND if you happen to be in Dayton, OH, this weekend for a little ham radio
sw
On 5/17/16 10:28 AM, Brent wrote:
Since CSAC's just popped up on the radar, has anyone measured the
performance of the CSAC since the acquisition by Microsemi and compared it
to the performance of CSAC's previously produced by Symmetricom?
I don't know that there's any difference per-se..
I he
Since CSAC's just popped up on the radar, has anyone measured the
performance of the CSAC since the acquisition by Microsemi and compared it
to the performance of CSAC's previously produced by Symmetricom?
I've heard some anecdotal comments that performance has degraded - can
anyone verify?
Brent
On 5/16/16 5:52 PM, Perry Sandeen via time-nuts wrote:
List,
Several years ago we were enthralled by the NIST designed Cs that still needed
cal once in a while.
It was listed for sale IIRC for $1400 or so.
Are you thinking of the CSAC? Chip Scale Atomic Clock? From Microsemi(
nee Symmetricom
> The CSAC behaves like a gas cell device (similar to a Rubidium)
> We do live in a “no free lunch” sort of world.
For measured ADEV of a CSAC (as well as no free lunch) see:
http://leapsecond.com/pages/csac/
/tvb
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Hi
Take a careful look at the specs on the SA.31M before you buy one. It
may or may not be what you are looking for in terms of stability and
temperature range.
We do live in a “no free lunch” sort of world. There will always be
tradeoffs in any design. It’s an amazing part, they did a lot in
On Tue, 17 May 2016 00:52:00 + (UTC)
Perry Sandeen via time-nuts wrote:
> Several years ago we were enthralled by the NIST designed Cs that
> still needed cal once in a while.
Which one do you mean?
> It was listed for sale IIRC for $1400 or so.
> Since then it has seemed to have fallen o
Hi,
Well, John Kipling who was the program champion for it at NIST got his
award during the IFCS conference. He managed to convince people and also
not back down from goals. It is certainly being looked at continuation
work such as "NIST on a chip" type of applications so more diverse set
of
mag...@rubidium.dyndns.org said:
> Friday was spectacular, as we where a few lucky to be bussed out the LIGO
> detector, Livingston. Extremely fascinating hardware. It's essentially a
> Michelson interferometer with 4 km arms. When you are there you only see
> half of it, as the building half-w
I wrote:
We will have to see how the Limelight case develops (i.e., is
interpreted in future decisions), but it was issued in a "methods" case
(as distinguished from the familiar case of physical widgets) and is
probably pretty narrow.
Lots of development has already happened.
The Supreme Co
Perry wrote:
I bought a HP 105B that is a later version. All the manuals I've searched for
end up being for the original version.
I'm pretty sure the file on Didier's site is the later version (1989)
with 10811.
Best regards,
Charles
___
time-
List,
Several years ago we were enthralled by the NIST designed Cs that still needed
cal once in a while.
It was listed for sale IIRC for $1400 or so.
Since then it has seemed to have fallen off of the radar screen.
Does anyone have any follow-up info?
Regards,
Perrier
___
Dear fellow time-nuts,
Last week as the International Frequency Control Seminar (IFCS) 2016 in
New Orleans. I thought it may be of some interest to list-members to
read some recollection of the events, from the top of my head.
This was my first time to the IFCS as well as New Orleans, so ther
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