Not sure what the precision setting is for (it's currently -19).
That's probably for NTP. Roughly, it's how many useful bits of data you get
when you read the clock. I can probably find a description if anybody is
curious.
-19 is 2 microseconds which is a reasonable ballpark for an embedded
Folks, there are some mildly interesting stories about time here:
http://www.bbc.co.uk/news/world-12849630
including (if I heard correctly) the statement that there are 350 atomic
clocks around the world!
Cheers,
David
--
SatSignal software - quality software written to your requirements
Ebay 180632718950
Is it this one?
Cheers
Stefan
-Ursprüngliche Nachricht-
Von: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] Im Auftrag
von Magnus Danielson
Gesendet: Freitag, 25. März 2011 00:31
An: Discussion of precise time and frequency measurement
Betreff:
Hi
Not available for purchase in the US. That's no fun, think of the bidding war
we all could have gotten into ...
Bob
On Mar 25, 2011, at 5:06 AM, Heinzmann, Stefan (ALC NetworX GmbH) wrote:
Ebay 180632718950
Is it this one?
Cheers
Stefan
-Ursprüngliche Nachricht-
Von:
Thinks for the tip. Have you used this on an actual tbolt?
Yes, I am using this squarer on my Tbolt. You may see my application here:
http://www.braddye.com/gps_do.html
Best regards,
Brad Dye
Editor, AAPC Wireless Messaging News
P.O. Box 266
Fairfield, IL 62837 USA
Telephone: 618-847-8118
Yeah, I would be one of the bidders for this little toy
ifn it was available for purchase here.
I think that someone needs to take up the flag to begin
a group project to scratch design a home buildable
reciprocal counter. The project would teach a lot and
would result in quite a few folks on
Hi
The whole counter thing has been run around in a thread back a month to
three months ago. It's in the archives.
Bottom line - if you want a cool one, it's got parts in it that are tough to
work with in a basement setting. If you stick with easy to solder parts,
it's not as cheap / fast /
Hi Bob;
ok, I understand that you are not a fan of this idea
but other people might be.
Your'e right about the price (I paid 200 for my 53181A
plus another 150 for the ovenized oscillator option)
but there is a lot more to be had here. Id say that for most
people it would be about following the
Hi
Are we talking about a 2ns 5345 or a 53181? They are vastly different
devices. The counter you asked about originally is approximately 10X better
than the one in the article you reference.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Hi
Just a show of hands sort of thing. It comes up each time we talk about
projects and never really gets answered. Rather than trying to work it out
as a part of a project, let's see if it can be addressed by it's self.
How many people are willing to solder up a project with multiple
Hi Bob:
Done it before - No.
Have done 0.05 (1.27mm) pitch and it's easy.
Done it / last 2 years - No.
Set up to do it - No.
I don't have a feel for the level of difficulty in working with 0.5mm
pitch parts. For example can you do it with a soldering iron (like I
use for 0.05 pitch
Well, if you ship a paste mask with the PCB I've no problem at all, but that's
not likely to happen, so it's down to hand work. I've done that before now and
while it's not the easiest job, it's quite doable with a microscope or the eyes
of an eagle.
Dave
-Original Message-
From:
Here are my answers:
Done it before? - yes.
Done it in the basement / last 2 years? - Yes. In last 24 hours actually.
Set up to do it in the basement? - Yes. Can do by hand, hot air rework
tools, or reflow oven.
Would I buy one? - done that before. Likely would again. (counts as a yes).
Would
Hi
You can indeed to it with a soldering iron. You need to have the right iron
and some skill to do it without messing things up. There are many other ways
you could do it.
To clarify a bit:
The layout will not be very forgiving of re-doing stuff a couple of times.
It's likely there would be
With regards to soldering .5mm pitch parts:
I've never done that professionally or as a hobby.
I don't see myself doing this at home.
On Fri Mar 25th, 2011 1:07 PM EDT Bob Camp wrote:
Hi
Just a show of hands sort of thing. It comes up each time we talk about
projects and never really gets
Hi
I don't see a way to reasonably ship a solder mask with each board. I agree
it would be neat, but it would cost ...
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Bob Bownes
Sent: Friday, March 25, 2011 1:25 PM
To: Discussion
Hi
Done it in the before - yes.
Done it in the basement / last 2 years - and from quite longer than that...
Set up to do it in the basement - yes
Would I buy one - I'm afraid I don't fully understand your question, but I
routinely buy and solder 0.5mm spacing TQFPs (counts as yes?)
Hi
The would you buy one? question is this:
Some (like me) buy things and then put them on the shelf hoping for
inspiration (or desperation) to strike. The more complex the assembly, the
less likely they are to complete. Others simply are not willing to spend
over say $100 on any sort of kit.
Hi,
I have done this sort of stuff multiple times, and am prepared to do it again
(in the basement) as long as my eyes are good enough and my hands steady.
0.5 mm pin pitch is certainly doable with a soldering iron. The trick is to not
be afraid of shorting pins. I often pull a reasonable
Hi
That sounds like a yes to me. Eventually I'll do a tally and I sort of
need to be sure I have people in the right buckets.
This is by no means a sign up to buy any specific project or kit. The
assumption is that what ever it is - it's interesting to you. The only
blocks to buying one would
My answers below (cursing iPad mail reader for this kind of thing)
On Mar 25, 2011, at 10:07 AM, Bob Camp li...@rtty.us wrote:
I'm not talking about opinions on weather it can or can't be done. It
certainly can be done and is done every day. What I'm asking is - would you
buy a bag with the
Hi
What ever technique has worked for you in the past is legal as far as this
poll is concerned. I suspect we could go on for quite a while about what is
the best or worst approach.
For the sake of this poll, let's leave the 0402's out. There certainly are
issues there, but I'd rather not get
Would I take on a project with those parts? Maybe but eBay places an
upper limit on what I'll spend to build something. I'd much rather
buy a used HP counter for $250 than spend $500 to build one. You'd
have to get the build cost to less than 1/2 the buy cost.
0.5 mm is not that hard to hand
Hi
At least the iPad doesn't put in double line feeds all over the place.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Jim Lux
Sent: Friday, March 25, 2011 1:46 PM
To: Discussion of precise time and frequency measurement
I have assembled hundreds of such parts using only a
low cost Antex 15W soldering iron, some fine diameter
solder and some solder wick. A hot air gun makes
removal very easy and I have never damaged a PCB
using the hot air removal method.
Solder diameter should be .010 - .015 mils Large
diameter
Hi
I'm guessing that's a yes to each of the questions in the poll.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Greg Broburg
Sent: Friday, March 25, 2011 2:53 PM
To: Discussion of precise time and frequency measurement
Subject:
My first answer would be heck no. Enough trouble with 16 pin chips.
BUT now you have set the bait. A cesium standard.
That would grab my attention. So indeed if there were not a time limit, I
would invest in a very small tip iron and the correct solder. I have come to
the conclusion also that the
On Fri, Mar 25, 2011 at 1:07 PM, Bob Camp li...@rtty.us wrote:
How many people are willing to solder up a project with multiple 0.5mm
spacing =144 pin package IC's on it?
The example was a LQFP 144-pins.
Done it before - no, but I have worked with SMT such as 18-pins SOIC
(1.27 mm) and 24 pin
Hi
For the sake of the poll, let's say it wasn't something crazy valuable. Pick
a piece of gear that's already on your bench (or that could easily be) and
assume we're talking about that. The cost to buy ratio may or may not be in
favor of the kit. A lot would depend on how much of a shopper you
Done it before: yes
Done it in the last 2 years: yes
Setup to do it in the basement: yes, I use soldering iron and/or hot air and
have a USB inspection microscope
Would I byt one? Yes Yes Yes I'm always on the lookout for more complex kits
Would do in a reasonable amount of time: Yes
I've
Hi
For the sake of the poll, anything over 50% confidence is good enough. I'll
put you down as yes to all the questions.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of michael taylor
Sent: Friday, March 25, 2011 2:06 PM
To:
Done it in the before - Yes
Done it in the basement / last 2 years - Yes
Set up to do it in the basement - Yes (bedroom, no basement)
Would I buy one - done that before. Yes
Would actually do it in a reasonable amount of time - Yes
___
time-nuts
On 03/25/2011 10:06 AM, Heinzmann, Stefan (ALC NetworX GmbH) wrote:
Ebay 180632718950
Is it this one?
Yes.
Cheers,
Magnus
___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
Hi
Any part of the home is fine.
All I'm trying to rule out is take it to work and have them do it and
take it to work and build it with their gear. Those might be unreasonable
constraints. There may be places that are fine with you using their reflow
oven and solder screen gear to make home
Bob
I would do it at home, but now that you suggested work. I could bum my way
into a assembly area. H. Think my odds just improved a lot. I did that
one time a while ago to burn some old style eproms and they had the right
programmer to do it.
Regards
On Fri, Mar 25, 2011 at 2:26 PM, Bob
My answers:
Done it in the before - yes.
Done it in the basement / last 2 years - yes.
Set up to do it in the basement - yes.
Would I buy one - depend on the specs - if better then 5370, yes.
Would actually do it in a reasonable amount of time - unlikely.
--
Hi Bob,
Have done it at home and work
Am set up at home
Would do it (have done smaller)
Robert G8RPI.
--- On Fri, 25/3/11, Bob Camp li...@rtty.us wrote:
From: Bob Camp li...@rtty.us
Subject: [time-nuts] Parts Selection
To: 'Discussion of precise time and frequency measurement'
Have I? Yes
Could I? Yes
Would I? For the kind of project mentioned, hell no. Life is too short.
On Fri, Mar 25, 2011 at 2:53 PM, Bob Camp li...@rtty.us wrote:
Hi
For the sake of the poll, let's assume that the project does not break any
new ground. It's as good as what you could buy,
Ok, I'll add mine
Done it in the before - yes.
Done it in the kitchen / last 2 years - yes
Set up to do it in the kitchen - yes, but not set up well.
Would I buy one - done that before. Likely would again. (counts as a yes).
Would actually do it in a reasonable amount of time -yes
ian
Hi
Since I have received some input off list (for what ever reason) the totals
will not name names.
Bob
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of gonzo .
Sent: Friday, March 25, 2011 3:01 PM
To: time-nuts
Subject: Re:
On Mar 25, 2011, at 11:26 AM, Bob Camp li...@rtty.us wrote:
Hi
Any part of the home is fine.
All I'm trying to rule out is take it to work and have them do it and
take it to work and build it with their gear. Those might be unreasonable
constraints. There may be places that are fine
Hi -
New to the list as of last night - much more activity than I expected.
As an introduction, my name I Brent, and I work mostly in the subsea
world, although prior to that, in the RF/microwave test equipment
world.
I expected to lurk for a good 6 months before chiming in, but what the heck.
That's my vote as well. Can do it, have done it, will do it again, but only
for things that are interesting enough to spend the time on. In other
words, no, I would not build a kit that replicated functionality available
in cheap surplus gear and was not otherwise technically interesting.
For
Done it in the before - yes.
Done it in the kitchen / last 2 years - yes
Set up to do it in the kitchen - yes.
Would I buy one - probably not, given your constraints. Never build what you
can reasonably buy.
Would actually do it in a reasonable amount of time -yes
As far as the stencil is
On Friday 25 March 2011, Bob Camp wrote:
Done it in the before - yes.
Yes.
Done it in the basement / last 2 years - no.
Yes.
Set up to do it in the basement - yes, but not set up well.
Yes.
Would I buy one - done that before. Likely would again. (counts as a yes).
Depends.
Would
Done it in the before - yes.
Done it in the home lab / last 2 years - yes.
Set up to do it in the home lab - yes.
Would I buy one - yes.
Would actually do it in a reasonable amount of time - Yes
A weekend or two.
--- Graham / KE9H
___
time-nuts
Haven't read all 33 replies, so I must be repeating at least one:
Can't do it. Too old and shaky. Don't want to buy expensive equipment
to equip myself to do it. Don't consider the micro to be a useful
tool, unlike most on this list. Have no trouble with vacuum tube
and 0.1 perf board parts.
My
On Fri, Mar 25, 2011 at 1:57 PM, John Miles jmi...@pop.net wrote:
Life is too short to turn your basement into a
one-person Chinese sweatshop. Meanwhile, the value offered by preassembled
eval/development/training boards can be considerable.
Even in Chinese sweatshops where people work cheap
Done it before - yes.
Done it in the basement - yes
Last 2 years - no.
Set up to do it in the basement - yes, but not set up well.
Anticipating buying a hot air system soon.
Would I buy one - done that before. Likely would again. - Yes
Would actually do it in a reasonable amount of time -
I'll chime in too.
I've done plenty of small SMT at work and I do have a stereo
microscope and suitable tools at home. I'd potentially try the toaster
oven reflow technique but mainly just to see if it works. Paste solder
is not my friend
On the other hand, I'd say it was easily worth a $50
Ok, thanks. I was so focused on the IRIG and 10 MHz parts I didn't
think about the NTP function (which is what the unit is for after all).
BTW - I had some misinformation in my original post. The Abracon
AOCJY1A is probably pin compatible with the TS2100 but it's not voltage
compatible. The
I have MTI 240 OCXOs
Greg
On 3/25/2011 10:02 PM, Robert Watzlavick wrote:
Ok, thanks. I was so focused on the IRIG and 10 MHz parts I didn't
think about the NTP function (which is what the unit is for after all).
BTW - I had some misinformation in my original post. The Abracon
AOCJY1A is
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