Bingo :)
> -Original Message-
> From: time-nuts-boun...@febo.com
> [mailto:time-nuts-boun...@febo.com] On Behalf Of gandal...@aol.com
> Sent: Sunday, June 28, 2009 2:47 PM
> To: time-nuts@febo.com
> Subject: Re: [time-nuts] Z3801A PSU and Outer Oven Control
>
>
> In a message dated 28
http://www.ko4bb.com/Manuals/05)_GPS_Timing/Efratom/Efratom_FRS-C_Rubidium_O
scillator.pdf
Didier KO4BB
> -Original Message-
> From: microwave-boun...@lists.valinet.com
> [mailto:microwave-boun...@lists.valinet.com] On Behalf Of Randy Bynum
> Sent: Monday, June 15, 2009 9:03 PM
> To: m
Here in Florida, we routinely store water in prevision of the next big one.
Plastic water bottles (any brand) start looking funny (shrunk) after a few
months, and downright scary (as in: you don't want to drink from THAT) after
a year or so.
It seems the gallon jugs do somewhat better than the sm
Most likely failures on power supplies are with the power components.
Failure of the pass transistor in a linear supply is likely to result in
overvoltage at the output, while failure of the switch on a switchmode
supply will blow the fuse instantly.
It is been my experience (after 30 years in the
They are both back here now. For a while, I could not even ping
www.tapr.org, but tapr.org went fine, so it was not the browser.
Just an Internet gremlin I am sure...
I have been moving the laptop between two wireless routers this morning, but
it does not normally do that, unless I did it at just
I think the influx of these models on eBay is because many of them now get
out of maintenance contract and the businesses replace them. My GX280 has
been turned on 24/7 (on a UPS) since I got it several years ago, and so far,
nothing has exploded :) This one came out of maintenance contract last ye
They all do that.
Didier
> -Original Message-
> From: time-nuts-boun...@febo.com
> [mailto:time-nuts-boun...@febo.com] On Behalf Of Connie Marshall
> Sent: Saturday, May 23, 2009 9:53 AM
> To: Discussion of precise time and frequency measurement
> Subject: [time-nuts] more 5370B
>
> Th
Part of the problem is that in some equipment (not all, but based on my
experience, most), the noise comes from not from the fan itself, but from
poor air routing inside the equipment itself. The air moving around
encumbered passage makes noise. As someone pointed out earlier, take the fan
out of t
The HP catalog lists the 5370A as capable of 6000 readings/sec in binary
mode, the 5370B is listed as capable of 8000/sec, probably as a result of a
slightly faster processor. Not a significant difference, but there may be
other subtle improvements between the two. The catalog pages are laid out
qu
My favorite Seiko watches all have the 7T32 analog movement (quartz). It is
probably the most complex quartz analog movement Seiko made. All three 7T32
watches I had repaired (by COSERV) cost me $70 or so for the movement
repair, and a few more $ for replacing the crystal and crowns. Movement
repla
COSERV, the official Seiko repair outfit. Address is on the Seiko web site.
I have sent several watches there and they do a top notch job. 100%
satisfaction.
Didier KO4BB
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of w...@aol.com
Se
I am back from vacation and the manuals that were uploaded last week have
been posted.
http://www.ko4bb.com/cgi-bin/manuals.pl
Thank you for your patience :)
Didier KO4BB
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Probably does not mean a lot for an amplifier, but it would for a mixer :)
Generic terms need sometimes to be put in the proper context :)
In fact, it's a negative number, now that I think of it :)
Didier KO4BB
> -Original Message-
> From: time-nuts-boun...@febo.com
> [mailto:time-nut
As long as one is not trying to measure extremely low signals (or extremely
high isolation), the conventional method works, and I have used it many
times, I am not sure that the method would scale when dealing with very high
levels of isolation.
I certainly would not trust a conventional VNA for i
I had the same problem here, and as it has been indicated, in my case it was
also the unidirectional connection (commands from the PC never made it to
the TB, so some data that is not automatically put out never got to the PC).
I had a bad pin on the serial port connector.
Check your wiring and si
Chuck,
That was exactly my point. I have used phase combining of power amplifiers
to increase power and I know it improves broadband noise performance (noise
figure) even though that is usually not why we combine power amplifiers. My
last phase-combined amplifier combines two 100W Ku band TWTs for
Dave,
How about using a true signal generator?
I have not checked the spec for my HP 8657B (it's flat enough for what I
do), but it will do all that you are asking for, and being a true
synthesizer, it can be used for much more than just calibrate scopes.
If flatness is not good enough, that cou
Warren,
This is what I believe, feel free to set me straight :-)
The 100Hz is done by synthesis from the GPS receiver's crystal oscillator,
which is usually not on a harmonic of 100Hz, at least not precisely (cheap
crystal) so the receiver will usually generate each pulse to the best of
it's abil
[EMAIL PROTECTED] wrote:
> On Sat, Oct 11, 2008 at 3:06 PM, Rob Kimberley
> <[EMAIL PROTECTED]>wrote:
>
>>
>> It was only when I ventured into newsgroups that I came across bottom
>> posting, which to me seemed totally illogical. I've read the pros of
>> bottom posting (and the cons of top postin
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Bruce Griffiths
> Sent: Saturday, October 11, 2008 7:24 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] COMPLETELY off topic - but I know
> you'll read it an
It never ceases to amaze me that this group is by far the highest S/N ratio
group that I belong to, populated by a vast majority of people who are
widely smarter than I am, and yet it seems many of these people can't figure
a thread because it may have mixed top-post and bottom-post and whatnot.
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Neville Michie
> Sent: Sunday, October 05, 2008 9:25 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] TBolt Monitor
>
> Hi Didier,
> a time (GPS) and date dis
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Neville Michie
> Sent: Sunday, October 05, 2008 5:20 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] TBolt Monitor
>
> The clock displays are of two types. T
Hank,
You can look at the source code for my Tbolt Monitor to see how I dealt with
that. The link to the source code is in my wiki page:
http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:gps_monitor
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL
The NEC 7210 was the industry standard GPIB chip for over 20 years, I still
have a few here. If you want the spec and can't find it, I probably have it
here somewhere.
Didier
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Brian Kirby
> Sent: Satu
Tell me what kind of signal you need to drive your clock, and I may be able
to get what you need from the processor.
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Neville Michie
> Sent: Sunday, October 05, 2008 6:34 AM
> To: Discuss
I suspect another reason is that even if it were adjusted, a user's
individual standard would still deviate from the NIST average standard, and
the drift would have to be accounted for anyhow, so what's the point of
attempting to mess with it and take the risk of loosing the data accumulated
so far
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Steve Rooke
> Sent: Thursday, October 02, 2008 2:02 PM
> To: [EMAIL PROTECTED]; Discussion of precise time and
> frequency measurement
> Subject: Re: [time-nuts] AC Connector On HP 5061B
>
> 2008/10/3
Piezo Mini Wonder info is at http://www.ko4bb.com/cgi-bin/manuals.pl
Search for "Piezo"
Didier KO4BB
2008/9/30 Richard H McCorkle <[EMAIL PROTECTED]>:
> Hello,
>
> I purchased three Piezo 2920136 units and the attached file
> documents what the pinouts and EFC requirements are.
> Hope you fin
The first sentence was confusing, replace with:
"I have tried several models, the original Trimble Bullet... "
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Didier Juges
> Sent: Sunday, September 14, 200
I have tried three models the original Trimble Bullet, the HP 58532A and
several pucks, including a nice Trimble mag-mount unit. Two of the pucks are
designed for marine use, with a decent waterproof case and mounting, but
they are in an all plastic case. There have no part number that I could see,
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Bruce Griffiths
> Sent: Saturday, September 13, 2008 10:48 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Thunderbolt Monitor (Didier Ju
t
Subject: Re: [time-nuts] Thunderbolt Monitor
Didier,
Any chance of the GPS Monitor which you are developing being available as a
kit?
Jeff
- Original Message -
From: "Didier Juges" < >
To:
Sent: Sunday, July 13, 2008 8:55 PM
Subject: [time-nuts] Thunderbolt Monitor
>I hav
As long as the power supply is not advertised as an end item, problems like
that are not within the scope of safety agencies.
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Hal Murray
> Sent: Thursday, September 11, 2008 7:24 PM
> To
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Didier Juges
Sent: Thursday, September 04, 2008 11:24 PM
To: 'Tom Van Baak'; 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Driving clocks from 1pps
Google "Obfuscated code contest" for fun :-)
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of David C. Partridge
> Sent: Friday, September 05, 2008 1:00 AM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] I wan
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Tom Van Baak
> Sent: Thursday, September 04, 2008 11:17 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Driving clocks from 1pps
>
> >> 50% duty cycle is way
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Tom Van Baak
> Sent: Thursday, September 04, 2008 6:37 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Driving clocks from 1pps
>
> > I am in the middle of the
That's the same manual I have on my web site:
http://www.ko4bb.com/cgi-bin/manuals.pl
Search for LPRO
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Bob Martinson
> Sent: Monday, August 25, 2008 12:56 AM
> To: Discussion of precise
I cannot answer exactly this question, but I was told by the Trimble sales
manager that somewhere along the lines (probably around 2000), the Tbolt
software was revised with the main goal of removing a lot of the lower level
settings and adjustments capabilites because too many customers were messi
This is for my manuals. The primary storage is the web site, the local hard
drive is the main backup and working copy, and I have a second backup on a
USB drive. I want the same content at all 3 places. I also have a second
backup web site, but I assume this one will just be a slave, updated when
c
ri, Aug 22, 2008 at 5:16 PM, Didier Juges <[EMAIL PROTECTED]> wrote:
> > I would have to upgrade to a Business package (instead of the Home
> > package) to have SSH, which would double the cost.
> >
> > I am evaluating FTPSync. It looks like it might do the job,
htly) don't permit telnet leave the SSH ports open, and
> it's a lot more secure for your data, anyway. I don't recall
> the exact magic to make rsync plus SSH work under Windows,
> but I think you could use PuTTY or Teraterm to provide the
> port forwarding.
>
>
uggestions
> along those lines.
>
> Among them was an open-source product called 'rsync.' This is the link
> for it.
>
> http://samba.anu.edu.au/rsync/
>
> Happy tweaking.
>
> ******* REPLY SEPARATOR ***
>
> On 22-Au
The problem nowadays is not the storage, it's the backup software.
I have most of my important data in 4 places: two web sites, main 250 GB
hard drive and external 500GB Western Digital USB Hard Drive (highly
recommended). What I call "important data" is about 30 GB worth of stuff
that is typicall
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of David Ackrill
> Sent: Tuesday, August 19, 2008 1:54 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] CE Mark
>
> Didier Juges wrot
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Jim Lux
> Sent: Monday, August 18, 2008 4:54 PM
> To: [EMAIL PROTECTED]; Discussion of precise time and
> frequency measurement; Discussion of precise time and
> frequency measurement
> Subject: Re: [
That is an interesting thread. So I feel like I have to add my $0.02
I am a casual programmer. I got into programming when I had to, because it
was, at one time, the path of least resistance for something I wanted to do.
I am otherwise an EE. Today, I spend my time 50/50 doing hardware design and
he original i80C31 that I
> learned on back in the mid-80's to a couple 89C450's and a
> AT89C51ED2 in 40 pdip that I wish I had a few more of. I
> have a couple Z80's, an 8085, 68000, 68020, none of which are
> particularly useful anymore. Then there's that one l
I am not sure what you mean about the 8051 being goofy to program in C.
Aside from the bit variable type, the Special Function Register declarations
and the memory types (data, idata and xdata), which you only deal with one
time (when declaring variables) and which you can even ignore in many
app
> NMEA mode...so will have to be careful.
>
> Thanks Alan G3NYK
>
> - Original Message -
> From: "Didier Juges" <[EMAIL PROTECTED]>
> To: "'Discussion of precise time and frequency measurement'"
>
> Sent: Sunday, August 10,
Alan,
I don't believe you have said what type of antenna you are using. If you are
using a true timing antenna (Symmetricom, Trimble Bullet) I would expect
little or no direct effect from the power lines, but if you are using a puck
or other inexpensive commercial antenna (which have little or no
The TB's PPS output has something like 5 ohm output impedance. It is very
desirable to terminate the coax cable with 50 ohm at the other end,
otherwise you will get endless ringing
The following web page uses the PPS output of the Thunderbolt to illustrate
ringing in a non-matched cable:
http://w
On both of my 5370As, the only way to permanently fix socket problems of
that type was to replace all the sockets with gold plated, machined pin
sockets.
On the 5370, that was easy because the boards have relatively large holes
compared to the socket pins, and there is no ground plane, so it was e
Rick,
Can you explain #2?
I understand ECL has more jitter, so I understand excluding ECL based
comparators, but why excluding ALL comparators? It seems to me the
comparators allow tighter control of the threshold, so it sounds as if it
would help at very low frequencies, unless the higher 1/f no
Very interesting thread.
I have been following half distractedly the thread on leap second, while
working on the firmware for my GPS Monitor. I am at version 0.1.2, and the
second line of the display is now used to display RX Mode, Disciplining
Mode, Temperature or DAC Voltage in succession, by p
> Reply to message 6:. .7300 de Dick
> W5UFZ How are leap seconds declared?
>
When tvb tells them to :-)
Didier KO4BB
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Start:
NOP
NOP
NOP
...
NOP
flip_bit
NOP
NOP
NOP
...
flip_bit
JUMP Start
(details omitted for clarity)
:-)
Didier KO4BB
Mike S <[EMAIL PROTECTED]> wrote:
> At 04:17 PM 7/23/2008, Tom Van Baak wrote...
> >I just prototyped this PIC algorithm and it works perfectly:
> >Exactly 10 MHz in giv
Problem is one period of 32768 is not a multiple of 100nS (one period of 10
MHz) so that won't work. Maybe there is a common denominator and it may be
possible to generate an average 32768 periods over one second, even though all
periods may not be equal.
Didier KO4BB
Mike S <[EMAIL PROTE
http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:store_position_on
_trimble_thunderbolt
Thank to John Miles for that one...
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of David Ackrill
> Sent: Tuesday, July 22, 2008 11:47
In my unqualified opinion, Trimble did something very smart with the
Thunderbolt.
Most previous GPSDOs use a stand alone GPS receiver, with its own CPU clock,
to generate the 1PPS signal, to which a separate OCXO is servoed via PLL and
occasionaly smart software.
The basic problem I see with thi
Chris,
What is the 440Hz used for, other than tune instruments?
Didier
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Baragwanath,
> Chris (TSG)
> Sent: Friday, July 18, 2008 4:43 AM
> To: time-nuts@febo.com
> Subject: [time-nuts] TimeNuts Assi
necessary.
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Thomas A. Frank
> Sent: Wednesday, July 16, 2008 11:06 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Thunderbolt monito
Interesting, I can show you my two VCRs with dim displays (Panasonic and
JVC, both about 10 years old and on 24/7), and I have used a number of the
Noritake VFDs in an application where the devices have been on 24/7 since
2000. In that application, only 2, 3 or 4 digits are on all the time, the
oth
eat.
> I am hoping that a kit of this proposed Thunderbolt monitor
> with the Noritake display will be made available through TARP
> in the near future. I am sure that many of the Thunderbolts
> which recently became available would benefit from such a kit.
> Jeff
> ---
I made a second version (same firmware) of the Thunderbolt monitor. This one
uses the plastic DIP version of the processor mounted on a small Radio Shack
proto board and it uses a gorgeous Noritake Vacuum Fluorescent display.
The interface between the Noritake and any ordinary LCD display is the
I have uploaded version 0.0.8.
Alarms (if any) are decoded and displayed in succession on the second line
of the display, alternated with the Disciplining Status.
The archive has been fixed, there was a problem with v004. If you downloaded
it and had problems, I am sorry...
Check the Wiki for det
Firmware version 0.0.4 is usable and has been uploaded, read the details and
download the firmware from my Wiki page:
http://www.ko4bb.com/dokuwiki/doku.php?id=precision_timing:gps_monitor
Some user interface (to select which information to display) would be nice.
2 lines of 16 characters is defi
nal Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Didier Juges
> Sent: Saturday, July 12, 2008 8:50 AM
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Double ovened 10811-60158 on ebay
>
> My u
My understanding of thermal regulation is that one of the more difficult
thing to do is precisely to know what is the temperature of the components
you are trying to stabilize.
If you have one oven (even double oven), you have one temperature sensor.
The best you can do is keep the sensor at a con
Monitoring the crystal temperature would probably be extremely boring. I
would expect it to be absolutely stable, as far as the internal TB
temperature monitor is capable of displaying it.
Monitoring the electronics temperature is useful because it relates to the
ambient and allows you to plot the
Found it, I'll look at it. I remember that thread now. I have been a little
preoccupied lately, hence the need for a diversion in the form of writing
software. However, it plays games with my short term memory :-)
Thanks
Didier
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[E
Well, I don't really have much time right now, but I started working on a
Monitor for the Trimble ThunderBolt (and other GPS receivers). With 3 TBs
here, it would make sense.
Here is where I am at the moment:
http://www.ko4bb.com/Timing/GPSMonitor/
The idea is to decode the TSIP packets 0x8F-
If the cable is long enough, the discontinuities brought by using a BNC
connector should not be too much of a problem, unless you are trying to
extract the very last ounce of performance from the Thunderbolt.
A long cable will have significant attenuation, and that will absorb most of
the reflect
I have used Olimex also, from the US. Good quality, reasonable price and
delivery, painless transaction overall.
Only problem the last time I wanted to buy from them: they were on vacation
and they simply did not reply or acknowledge my email until 2 weeks later
when they came back... In the mean
These are still available from Tektronix, even though last time I checked,
you can buy a working Tek 2430 storage scope on eBay for less.
I have one in my TDS-210, but I would not give it up for anything (oh well,
almost anything...)
Didier KO4BB
> -Original Message-
> From: [EMAIL PROT
No, I think it's just a vast conspiracy :-)
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Chuck Harris
> Sent: Friday, July 04, 2008 9:14 AM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] New l
The 9390 manual is in the GPS_Timing directory.
Considering Nigel's comment below, I have made a couple of changes to the
upload script and the manuals page so that any upload (via script of via
ftp) will show up in the Recent Upload directory. However, whatever is
uploaded via ftp will not show u
The GPS-4 manual is on my web site. Search for GPS-4
http://www.ko4bb.com/cgi-bin/manuals.pl
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Scott A Sybert
> Sent: Saturday, June 28, 2008 3:24 PM
> To: time-nuts@febo.com
> Subject: [
I used a standard 0.1" spacing connector for a test and it works fine. Of
course, you would have to remember which way to plug it...
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Richard W. Solomon
> Sent: Friday, June 27, 2008 12:2
Hal,
I have two Prolific adapters on a single hub, which is probably low speed
(it was cheap). They work fine under XP, even though one of them is used
with a program (development system) that has shown some finicky behavior
when driving a serial input JTAG box with the old drivers. The other one
That's a good point. The older Prolific drivers had a nasty habit of
crashing my laptop (Win XP would not wake up) if I put it in hibernation
with the adapter plugged into the USB socket. The new drivers mostly fix the
problem. I may occasionaly have to unplug and replug the device after waking
up,
Here is what terminating impedance does to a fast signal:
http://www.ko4bb.com/Test_Equipment/CoaxCableMatching.php
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Didier Juges
> Sent: Thursday, June 19, 2008
Mark,
Have you put a scope at the line to see what the signals look like at the
end of the 25 foot cable? What kind of distorsion do you see? You may be
able to improve things quite a bit with the proper termination.
When using unknown cables to send relatively fast signals, yet not critical
eno
ago when you
> posted the "Store Position On Trimble Thunderbolt" section,
> and I couldn't find anything on that, although I can today.
>
> That said, thanks for maintaining your site of very
> useful information.
>
> Regards,
>
>
See this method which works well under XP:
http://www.ko4bb.com/cgi-bin/wiki/save.cgi?DisableSerialMouseDriver
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of David C. Partridge
> Sent: Sunday, June 15, 2008 1:53 PM
> To: 'Discussion
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Thomas A. Frank
> Sent: Friday, June 13, 2008 10:18 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Non-impedance matched antenna cables
>
> > I've another a
> > I would like to add an extra question:
> >
> > How about adding an extra filter after a cheap PC power supply?
> >
> > 73,
> >
> > Rainer
> >
> >
> Whilst that may help with the high frequency power supply
> noise, it wont help with power supply flicker noise.
>
> Bruce
Or the lousy reg
Here is how I *glued* the AllElectronics power supply to the top of the
Thunderbolt and shortened the cable for a neat, compact package. I connected
the chassis wire of the power supply to the TB case.
http://www.ko4bb.com/Test_Equipment/Thunderbolt/group_buy/
The power supply is the exact same l
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Bruce Griffiths
> Sent: Wednesday, June 11, 2008 9:03 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] Finally acquired a 5370B
>
> It is usually worthwhile t
Jim,
I have two 5370A counters, and both were afflicted by the "cheap socket"
syndrom.
After a year or so of intermittent operation (in spite of frequent removing
and reseating of the parts and application of Deoxit Gold), I took the two
boards with most of the sockets (processor board and memory
recise time and frequency measurement
> Subject: Re: [time-nuts] Thunderbolt PS
>
> Call who???
>
> - Original Message -
> From: "Didier Juges" <[EMAIL PROTECTED]>
> To: "'Discussion of precise time and frequency measurement'"
You may try to call them, they may still have a few on hand.
They were on the web site just a week ago.
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Bruce Lanning
> Sent: Wednesday, June 11, 2008 11:33 AM
> To: time-nuts@febo.com
http://www.agu.org/journals/sw/swa/free/newarticle/?id=2008SW000400
Didier KO4BB
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That's a good question: on the computer side, can a single serial port be
used for both 1PPS (for ntpd purposes) using one of the modem control
signals and for serial gps monitoring without having to write custom code?
Didier KO4BB
PS: I would advise against going inside the TB and adding the 1P
This is what they look like:
http://tonga.globat.com/~ko4bb.com//Test_Equipment/HP_5334B_Rack_Flanges/
The right one has some scuff marks in the paint, but the metal is fine.
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Scott Mac
I have a pair which came from a 5334B and which I would gladly trade for the
feet :-)
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Scott Mace
> Sent: Wednesday, June 04, 2008 5:48 PM
> To: Discussion of precise time and frequency m
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of David C. Partridge
> Sent: Monday, June 02, 2008 1:20 PM
> To: 'Discussion of precise time and frequency measurement'
> Subject: [time-nuts] PCB design questions
>
> I've been working on the design
That looks a lot like the 10 MHz HP 10811 that I am playing with right now.
The side with the connectors is exactly the same.
Mine came out of an HP 8267A microwave synthesizer.
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Randy L
Mark,
If it is more recent than this one, please could you scan it for me?
http://www.ko4bb.com/Manuals/HP_Agilent/HP_-_59306A_59306-90001.pdf
I would then post it there for all to see :-)
Thanks in advance,
Didier KO4BB
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAI
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