Silabs has a uC, I think it is the C8051F350 but I may be wrong, that has a 24
bit ADC with 1-128 gain PGA and offset DAC (and two 8 bit DACs).
Most their chips are available already soldered to a small development board
called Toolstick that typically costs $10. You will also need a $20 base
A
They are used in Russia, and that is pretty much what is happening. I can't
imagine those being used in France...
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: "Poul-Henning Kamp"
Sender: time-nuts-boun...@febo.com
Date: Mon, 1
I bought two several years ago, one was advertised as working and the other as
broken.
Turns out both had the same problem: the socket syndrome, common on these
instruments. I paid $100 for each.
They would work intermittently.
I have not seen one near that price recently.
I have since replac
I started a wiki page with the pin-out information ans was planning to copy the
most interesting posts, but I do not have one, so the incentive is pretty low
at this point. If you want to do it, be my guest.
http://wwwmko4bb.com/dokuwiki/doku.php
Didier KO4BB
Sent from my BlackBerry Wireless t
There are many ham radio clubs in the country. It has been my experience that
many are not much more than gathering places for buddies to talk, but that they
would actually welcome technical activities, so it should not be too hard to
find such a spot.
You may have to get your ham ticket to qual
At the end of the day, what defines how much power is burned in the drive
circuit is the current in the LED, not how its generated (resistor or current
source), unless you use a switching regulator.
In most cases, you should get sufficient current stability using resistors if
you start from a 5
John,
Is there a way to make a dll or an ocx out of the gpibport.cpp so that I could
use it from within visual basic?
Didier
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: "John Miles"
Sender: time-nuts-boun...@febo.com
Date: Mon, 23 Jan 20
You are welcome to use my time-nut wiki, it's at
http://www.ko4bb.com/dokuwiki/doku.php
It is open, no need to register
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: "Poul-Henning Kamp"
Sender: time-nuts-boun...@febo.com
Date: M
You are welcome to upload it to my manuals pages
www.ko4bb.com/manuals
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: Bob Bownes
Sender: time-nuts-boun...@febo.com
Date: Wed, 1 Feb 2012 12:41:19
To: Discussion of precise time a
Magnus,
How do they compare in price to the receivers we normally use for timing?
Do you see any advantage for a timing receiver to fix faster than once per
second?
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: Magnus Danielso
Rob,
Can you upload it to my site?
www.ko4bb.com/manuals/
THANKS IN ADVANCE,
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: "Rob Kimberley"
Sender: time-nuts-boun...@febo.com
Date: Tue, 31 Jan 2012 21:14:59
To: 'Discussion of
www.ko4bb.com/manuals
Click on "Upload files" and follow instructions
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: Azelio Boriani
Sender: time-nuts-boun...@febo.com
Date: Wed, 15 Feb 2012 18:08:17
To: Discussion of precise ti
I work for a defense contractor. We used to make certain commercial test
equipment, some 40 year old stuff is still being used today and lots of it has
been sold to China, Korea, Taiwan and others with full manuals and schematics.
Nowadays, these same manuals and schematics (for the 40 year old
You can always upload them to my site as if it was a manual (follow the manual
upload instructions). If you let me know in a comment, I will leave the file in
the upload area where anyone can retrieve it via ftp.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
I saw this just before leaving home and I must admit I posted it before reading
it...
But by now everyone knows what the problem was!
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: "Bill Hawkins"
Sender: time-nuts-boun...@febo.
Rick,
Thanks for the comments on Eagle.
I have been frustrated trying to learn Eagle for a small urgent project
recently. I ended up using ExpressPCB and the attendant schematic capture.
While it uses proprietary file format and is therefore locked to one vendor, it
was surprisingly easy to use
Said,
I can give you C code for a Silabs 8051 driving an I2C RTC in bit-banging mode
(works with ANY chip)
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: saidj...@aol.com
Sender: time-nuts-boun...@febo.com
Date: Tue, 28 Feb 201
I shipped my Loran receiver to the south hemisphere a couple of months ago for
the cost of shipping, not sure if it ever made it.
I suppose no news is good news?
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: paul swed
Sender: t
I have two 5370A and both run about the same temperature.
It is high, but the heatink only supports a few power bipolar transistors used
in the power supply that are designed to run hot.
Other than the inconvenience of having blisters if you touch the heatsink, I
would not worry about it. Its b
If you have a small canned VCXO, thermal performance will not be as good as an
OCXO like the HP10811, so the optimum time constant of the filter will not be
very long, and the analog solution is more practical.
You may want to look at the James Miller design. He uses a Jupiter GPS receiver
whic
Poul-Henning,
Do you need 16 bits or can you get by with a 12 bit ADC?
Have you considered using an FPGA for signal processing? It seems you need a
fairly serious CPU to handle that much data.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Messag
"Patent Pending" only means that if you copy the design and sell it, some time
in the future (if and when the patent is granted), you may have to stop. You
will not have to buy back your products or pay anything or be required to
license for past use once the patent is granted as long as you sto
I was not concerned about processing power on a PC (or Mac for that matter) but
for the uC that was used in PHK's project.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: Chris Albertson
Sender: time-nuts-boun...@febo.com
Date:
Do not forget that BlackBox sold Converters and Controllers that are identical
internally to the IOTech boxes.
The EPROMs can also be swapped between these two.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: "J. L. Trantham"
Se
SRS620 schematics are on ko4bb.com
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: John Ackermann N8UR
Sender: time-nuts-boun...@febo.com
Date: Fri, 23 Mar 2012 14:46:07
To: ; Discussion of precise time and frequency
measurement
I have often seen (don't ask me how) silicon diodes getting so hot that they
unsolder themselves from the board and fall at the bottom of the equipment
enclosure, yet they work fine after the fact even though they don't look so
good.
I have been tempted to solder them back in in more than one o
I agree and it is unfortunate, because of all the email accounts I have (and
that's quite a few), I like their web mail client the best.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: Attila Kinali
Sender: time-nuts-boun...@febo
The need for sawtooth correction comes from the fact that standalone GPS
receivers use a standard clock oscillator that is basically fixed frequency
(save for temperature and other fluctuations) and their only option is to align
the desired PPS to the closest clock pulse.
Please note that the T
Hi Chuck,
Mine is not dead, just hard of hearing...
Once I realized that, I set it aside and I have not used it in years.
I got it with a red box Thunderbolt I bought from a lit member a long time ago.
It has some obvious signs of experience being outside. It is possible that
moisture got insid
The elevation angle filter is based on the satellite position, not the actual
direction the signals come from.
If you have reflections and multipath, but the satellite is otherwise high in
the sky, you are out of luck regardless of elevation angle filter.
Of course, the higher the sat, the less
If the satellite is above the mask, the signal will be used in computing a
solution even if it got in through reflexions and multipath. That's why a good
antenna with choke rings is desirable.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Messa
An older laptop (Pentium M for instance) can be had for $80 or so any day of
the week, won't take much space, is completely standalone (built-in keyboard
and display, built-in battery backup) and sips power when idle, which it will
be most of the time.
The only issue is that you might be tempte
When you install the Altera tools, it automatically installs NIOS and gcc. I
assume there are no restrictions for private use, but you may have to send $ if
you make a commercial product. That remains to be checked.
I have not used NIOS either.
Didier KO4BB
Sent from my BlackBerry Wireless thin
I have updated my GPSMonitor firmware project.
Version 0.3.3 released last year allowed to display local time, by applying the
time zone offset and the GPS offset (15 seconds at the time). However, GPS
offset was hard coded, so it would require a reflash after a leap second.
Version 0.3.4 colle
Michael,
There is a very effective fix: move!
:)
I live in NW Florida and I believe I have found a good solution to the
lightning problem.
Since lightning never strikes the same place twice (or so goes conventional
wisdom), I built my 60' antenna tower a few feet from the exact spot where a
I agree that memory depth is an under appreciated parameter, but even 2,500
points like what's available on the cheap Tek scopes is quite useful.
On the other hand, I had a few LeCroy with 50k deep memories and there are
cases where that is very useful too. I can't imagine real life use cases w
Must be the reason behind the puzzling menus of Microsoft Office 2007 and up...
Everything requires one or two more clicks than the 2003 vintage.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: Scott McGrath
Sender: time-nuts-bou
True, the LeCroy I have has +/- trigger, which is sometimes invaluable and very
hard to emulate if your scope does not have that feature.
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: Tom Knox
Date: Tue, 17 Apr 2012 08:33:35
T
That's why the default mode for a DSO should always be "pulse detect" or
whatever the manufacturer calls it, unless you know what you are doing. As far
as I know, all DSOs have this or an equivalent mode where the ADC runs at full
speed regardless of sweep speed, and the min and max readings bet
One issue with X-Y mode on analog scopes is the different bandwidth of the two
signal paths. Do not expect to have amplitude or phase fidelity within the
vertical bandwidth. 1/10th of it is probably the best you can hope for.
In that regard, DSOs with all their quirks are more symmetrical since
"A non-sampling oscilloscope with limited bandwidth could just as easily
miss a narrow pulse because of bandwidth constraints no matter how
high its sampling rate."
That is the point of the thread. Even a wide bandwidth analog scope used to
show a 500nS pulse at a 200Hz repetition rate will have
It seems like it would be very tight in a single plug-in, if it even fits. A
dual PI would certainly work though.
Also, as someone pointed out, the TM-500 series may not have the power and
cooling available. I have. TM-5006 chassis that would certainly do the job in
both regards, but that's th
Robert is obviously correct, however you would be very hard pressed to be able
to measure the difference between shoulder screws and regular screws in
practice, either through insertion loss, VSWR or power handling.
So much so that I have never seen shoulder screws used on rectangular
waveguide
See http;//www.ko4bb.com/Test_Equipment/Thunderbolt/PulseStreching/
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: Arthur Dent
Sender: time-nuts-boun...@febo.com
Date: Sun, 26 Sep 2010 05:07:50
To:
Reply-To: Discussion of precise time and frequency meas
Last time I checked, the HP/Symmetricom HP58532A GPS antenna was cheaper than a
GPS splitter (I paid $50 for my HP58532A, with shipping, and it was brand new).
Of course, with two antennas, you will need two feed lines which, depending how
long they are, could cost you more than the antenna itse
The BFO is (are, one for USB and one for LSBY the only oscillator that is not
phase locked to the HP10811 inside, and that can be remedied, so it is not
hopeless.
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: "J. Forster"
Sender: time-nuts-boun...@febo.com
Da
"There's the minor issue of getting the power company to put in a cable to the
house for your 1 Mw (capital M not lower case M) transmitter."
I can't resist citing a personal anecdote regarding power distribution.
A few years back, I was working on a proposal for a high power (1MW) power
supply
That is basically the sauce behind GPS. What is the power of the transmitters
on the satellites? It can't be much, and the signal on the ground is quite a
bit below the noise floor before correlation.
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: "Poul-Henning
Not necessarily, on 3 phase systems, you would have to be creative to get below
.9
You can easily get to .95 with a simple multipulse rectification. Beyond that,
other than regulatory compliance, you do not gain much efficiency.
I can't imagine these systems running on anything other than 3 pha
I visited Pleumeur Baudou shortly after it opened, my father was an engineer
with the French Telecom ministry (PTT at the time) and he knew people there. I
remember the gigantic offset horn and the maser amplifier. Too bad I do not
have pictures from this event.
Didier
Sent from my Verizon Wi
I have an HP-4508A Vector Voltmeter that has a bad case of meter paint peeling.
I took pictures to have in case it gets worse (which it probably will), but I
am concerned that any attempt at taking the meters apart (as I would need to
actually scan the meter faces directly on the scanner to have
Ok, you beat me to it, thanks!
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: WB6BNQ
Sender: time-nuts-boun...@febo.com
Date: Tue, 12 Oct 2010 13:11:46
To: Discussion of precise time and frequency measurement
Reply-To: Discussion of precise time and frequency
Of course, that's the whole point of the web site :)
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: paul swed
Sender: time-nuts-boun...@febo.com
Date: Tue, 12 Oct 2010 09:31:05
To: Discussion of precise time and frequency measurement
Reply-To: Discussion of pr
Good point, but still a whole lot better than a blank face with paint chips at
the bottom :)
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: gsteinb...@aol.com
Sender: time-nuts-boun...@febo.com
Date: Tue, 12 Oct 2010 11:11:09
To:
Reply-To: Discussion of preci
Well, I suffer not only from dislexia, but also blurred vision. It's a 4800A
The meters look the same as the 4805A though.
To my defense, my cardiologist told me last week that my "good" cholesterol was
too low and he recommended that I drink a glass of red wire with dinner every
day to raise i
I think that's what Jim is saying. If you try to fit to the signal using only
the zero crossing, it will be hard unless you have a lot of zero crossing,
because you will have only one point per period to fit to. If you fit 10 or 100
points per period, you improve your fitting considerably. That
I bought one item from Lothar. It actually shipped 10 days after he swore it
was in the mail, but it was as described and was a good value for the price.
YMMV
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: Perry Sandeen
Sender: time-nuts-boun...@febo.com
Date:
That's KO4BB.com
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: "David Smith"
Sender: time-nuts-boun...@febo.com
Date: Fri, 22 Oct 2010 19:25:33
To: Discussion of precise time and frequency measurement
Reply-To: Discussion of precise time and frequency m
Keep in mind that most programmers made in the last 25 years are microprocessor
controlled, with their own firmware, so while you are at it, you might as well
back those up too, but if it's your only programmer, you are stuck...
Didier
Sent from my Verizon Wireless BlackBerry
-Original Mes
They are required to keep it by law, and they will get paid to look for stuff,
if anyone (most likely the government of a court) wants them to, so I am not
sure why they should spend their own money to make that task easy...
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message
Joe,
Could you upload it to my site?
Thanks
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: "J. L. Trantham"
Sender: time-nuts-boun...@febo.com
Date: Mon, 25 Oct 2010 07:37:45
To: 'Discussion of precise time and frequency measurement'
Reply-To: Discussion
"I suspect that at time of death, brain activity doesn't instantly cease, but
decays."
I suspect that was not the case for the guy who was sucked into the jet engine
:)
Or it was a pretty fast decay...
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: Mike Naru
Just search for satstat
Search is always the easiest
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: "Richard W. Solomon"
Sender: time-nuts-boun...@febo.com
Date: Thu, 28 Oct 2010 09:59:01 -0700 (GMT-07:00)
To: Discussion of precise time and frequency measureme
Yes, but on the other hand, he would thaw in a hurry :)
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: Perry Sandeen
Sender: time-nuts-boun...@febo.com
Date: Wed, 27 Oct 2010 15:51:53
To: time-nuts-requ...@febo.com
Reply-To: Discussion of precise time and freq
I have been distracted, but will move the uploads folder tonight
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: paul swed
Sender: time-nuts-boun...@febo.com
Date: Thu, 28 Oct 2010 22:02:35
To: Time-nuts
Reply-To: Discussion of precise time and frequency
So what you say is that access to what's below the Plank time is on a
"need-to-know" basis only, and we don't need to know?
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: Chuck Harris
Sender: time-nuts-boun...@febo.com
Date: Fri, 29 Oct 2010 21:16:58
To: Disc
I cannot open the manual with either Adobe Acrobat or Foxit. You may want to
resend it with a different name.
The file header looks good, but I have found that the pdf viewers are finicky
if even a small part of the file is missing or messed up.
Didier KO4BB
Sent from my Verizon Wireless Blac
Yes, it is good now and I moved it. As always, when looking for something on my
manual pages, use the search box.
Didier
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: Ziggy
Sender: time-nuts-boun...@febo.com
Date: Sun, 31 Oct 2010 09:53:51
To:
Reply-To: Discussion
Don't get hung up around the idea that a TCXO is always better than a plain XO.
They are typically designed the reduce the effects of large temperature
variations, but a typical OCXO will be much better when your temperature
variations are limited, like at home.
Also, a TCXO will usually have l
Absolutely, actually, if you don't mind, I will get your marked-up scan and add
it to my collection :)
My own 3586A bit the dust some time ago (looks like a shorted cap across the
supply somewhere), so the manual will come handy.
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Orig
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: shali...@gmail.com
Date: Tue, 30 Nov 2010 20:49:53
To: Chris Albertson
Reply-To: shali...@gmail.com
Subject: Re: [time-nuts] If there a FAQ
Many signal generators and counters, signal analyzers and the venerable HP3586
c
Paul,
You are welcome to upload your project files to my site. You can also use the
Wiki to make a project information page.
Let me know if you need any "Getting Started" help with the Wiki.
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: paul swed
Sende
My favorite watches all use the 7T32 calibre from Seiko. I have 4 at the
moment. This calibre is quite accurate enough (the drift is minimum,
considering this quartz analog has to be readjusted every 2 months anyway
(calendar is 31 days/month). It has a second hand, calendar, a very convenient
I have also observed the low sensitivity of the T-Bolt here. The older one (red
box with built-in DC/DC converters) barely worked with the Trimble Bullet
antenna I got with it, but works fine with an HP 58532A and also with a small
mag-mount Trimble model.
The two newer T-Bolts (group buy) appea
I thinks that's because the algorithms used work well most of the time, simply
not all of the time. You can call it sloppy work if you want, or you can call
it an example of effective business model: provide a tool that will satisfy 95%
of a perceived (or real) need for the price of an average C
The additional advantage is to give you diversity and some immunity against
multipath (at least it reduces the probability that both receivers will be
affected at the same time due to weird constellation issues or local
interference).
But it now creates an issue which is how do you know who is
I have had mixed success (I am being generous) getting these kinds of displays
working properly after being disassembled. The trick is to align the display
itself with the traces on the PWB. The elastomeric connection is a funny thing
that conducts electricity in only one direction, so its align
Fred,
Good luck on your project, it sounds exciting.
I have been able to get a couple of samples for free from Hitite. That was
several years ago (before the recession...)
Regarding FPGA, Actel has a demo board for their SmartFusion device (big
flash-based FPGA + Cortex M3 processor + 256k pro
Also they are almost impossible to solder by hand without setting high internal
stress which sometimes results in cracks, not necessarily immediately. Even on
professional wave solder equipment, high delayed failure rates are not
uncommon, which sometimes results in many units having to be recal
Jim,
You should be able to model it in Spice and do an FFT on the output.
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: jimlux
Sender: time-nuts-boun...@febo.com
Date: Sun, 23 Jan 2011 17:35:38
To: Discussion of precise time and frequency measurement
R
In many instruments, a lot of the fan noise is actually noise from the air
blowing over obstructions, so changing the fan will not reduce that noise,
unless the air flow is reduced. That will be generally true for the type of
equipment that dissipates a lot of heat in a small package, like a Tek
Most AC fans of a given size will have a bigger motor than DC fans of the same
size. That leaves less cross section for the air, therefore for the same air
flow, air will have to move faster and be noisier. It is not a question of 12V
versus 120V, its DC versus AC.
Didier KO4BB
--Original
The LM 158 and LM358 are the same part, just different screening levels and
packaging.
For commercial applications at normal temperatures, the LM358 is fine.
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: paul swed
Sender: time-nuts-boun...@febo.com
Da
My original (red box) T-bolt runs off a 28VDC supply. For that, it has a
built-in DC/DC converter. The specs are the same as they are for the more
common (and more recent) version.
You do not need rocket science to make a switcher quiet enough for most
purposes, just care and good engineering.
It sucks, but they may only have a small qty of the spares, and they keep them
for those customers who paid full price.
However, I agree about the high price. That would be better than "go away"
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: li...@lazygr
Or you try all the possible solutions all at once in parallel in a big FPGA and
you have instant synch (at least in the time it takes to recognize you have it)
May be impractical for very long, complex sequences...
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message---
A while ago, I took a pair of watches (a Bulova and a Seiko) that needed new
batteries to a fancy jewelry store here in town (VanDeGriff) because I thought
they would do a good job.
The Bulova took 6 weeks... (They apparently did not service anything locally
and had to sent it out). They said t
Precisely because most of us do not have access to much fancy test equipment (I
am one of the lucky ones), there is no excuse for not using freely available,
quality tools (assuming that you have a computer) like LT Spice.
Of course, you have to be careful as the quality of the output from any
I wanted to say "those customers who bought them new directly from them"
While I do not agree with the practice, many companies treat their primary
customers better than those who buy aftermarket.
What is relevant is what the vendor believes is relevant. What you and I think
about it IS irrelev
http://www.ko4bb.com/Timing/GPSMonitor/
Didier KO4BB
--Original Message--
From: James Fournier
Sender: time-nuts-boun...@febo.com
To: Time-Nuts
ReplyTo: Time-Nuts
Subject: [time-nuts] Enclosure for Thunderbolt
Sent: Feb 22, 2011 8:05 PM
Does anyone have a recommendation for a nice instru
Burt,
I am interested by that mod also.
Thanks in advance,
Didier KO4BB
Sent from my Verizon Wireless BlackBerry
-Original Message-
From: "Burt I. Weiner"
Sender: time-nuts-boun...@febo.com
Date: Thu, 24 Feb 2011 13:12:25
To:
Reply-To: Discussion of precise time and frequency measu
Look for a message from John Miles dated Feb 23 with this subject line:
Re: [time-nuts] was there ever a "conclusion" on distribution amps ?
--Original Message--
From: Dan Rae
Sender: time-nuts-boun...@febo.com
To: Time-Nuts
ReplyTo: dan...@verizon.net
ReplyTo: Time-Nuts
Subject: [time-nut
Maybe there are a few of those "countdown to Y2K clocks laying around that
could be recycled?
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: gandal...@aol.com
Sender: time-nuts-boun...@febo.com
Date: Wed, 16 Mar 2011 06:36:12
To
Dick,
Can you send me the manual, or upload it directly to my manuals page?
Thanks es 73,
Didier KO4BB
Sent from my BlackBerry Wireless thingy while I do other things...
-Original Message-
From: "Richard W. Solomon"
Sender: time-nuts-boun...@febo.com
Date: Thu, 17 Mar 2011 13:40:27 -0
If the plan is to drive a mechanical clock, I assume long term stability is
more important than phase noise. Many small microcontrollers (I use 8051's from
Silabs) have a built-in PLL that can be set to run at 15 MHz from an external
10 MHz reference (applied to the external oscillator input), a
There may be a significant fraction of power that goes into linear regulators
for the electronics not related to the oven that do not contribute to heating
the oven, yet draw constant current, i.e. power will drop at lower voltages,
yet not affect the oven.
Didier KO4BB
Sent from my BlackBerry
Hi Bert,
That is very interesting, thank you for sharing.
Didier KO4BB
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-Original Message-
From: "Bert, VE2ZAZ"
Sender: time-nuts-boun...@febo.com
Date: Mon, 21 Mar 2011 10:11:04
To:
Reply-To: Discussion of precise tim
0.5 mm TSSOP, MSOP and QFPs are not fun but OK. 0.65 is considerably easier,
not only to assemble, but also if you have to put a scope probe tip on one of
the pins. I can work with 0.65 without magnifier, 0.5 I can't.
QFNs are a no-no for me in the current state of affairs, even though I see the
You cannot change impedance without changing geometry or dielectric, and any of
these changes will affect vop.
Didier KO4BB
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-Original Message-
From: Joseph Gray
Sender: time-nuts-boun...@febo.com
Date: Sun, 3 Apr 2011 1
"Basically, the higher the division ratio in a PLL synthesizer,
which is what you are describing, the greater the phase noise."
In that case, that may not be a problem. Since the oscillator is a crystal,
phase noise should be low enough.
One other issue is that most crystals only want to move i
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