Re: [time-nuts] A milestone approaches

[Bill Riches]

Hi Tom

I passed this along to two of my old time computer gurus - I am sure they will 
want to celebrate!!

73,

Bill, WA2DVU
Cape May

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Tom Van Baak
Sent: Wednesday, July 12, 2017 8:19 AM
To: Discussion of precise time and frequency measurement 
Subject: Re: [time-nuts] A milestone approaches

Hi Bill,

> Got this from a friend whose MN license plate is UNIX.

Join the club! There's ~50 of us in the US: http://leapsecond.com/pages/unix/


> At that instant, billions of Linux and Unix computers and devices

Plus embedded devices, such as Arduino, where 31-bit time_t C libraries are 
also used...


> return time() == 15.  It will not be until 2033 when that number 
> reaches 2 Billion.

Thanks for the notice. Add these to your list:

1414213562 0x544b2fba Sat Oct 25 06:06:02 2014 GMT (sqrt 2)
1415926535 0x54655307 Fri Nov 14 00:55:35 2014 GMT (pi)
1420405752 0x54a9abf8 Sun Jan 04 21:09:12 2015 GMT (H-maser Hz)
15 0x59682f00 Fri Jul 14 03:40:00 2017 GMT (1.5 billion)
1616161616 0x6054ab50 Fri Mar 19 13:46:56 2021 GMT (pretty in dec)
1616928864 0x60606060 Sun Mar 28 10:54:24 2021 GMT (pretty in hex)
1717171717 0x6659f605 Fri May 31 17:08:37 2024 GMT (dec looking like oct)
1886417008 0x70707070 Thu Oct 11 13:43:28 2029 GMT (pretty in hex)
1985229328 0x76543210 Sun Nov 28 04:35:28 2032 GMT (hex digit countdown)
20 0x77359400 Wed May 18 04:33:20 2033 GMT (2 billion)
2004318071 0x Thu Jul 07 04:01:11 2033 GMT (pretty in hex)
2147483647 0x7fff Tue Jan 19 03:14:07 2038 GMT (end of time)
2147483648 0x8000 Tue Jan 19 03:14:08 2038 GMT (you survived)

While we're at it, we have a rare T MJD event coming in 2023:

1968-05-24 00:00:00 UTC (DOY = 145, Fri) = JD 244.5 = MJD 4.0
1995-10-10 00:00:00 UTC (DOY = 283, Tue) = JD 245.5 = MJD 5.0
2023-02-25 00:00:00 UTC (DOY =  56, Sat) = JD 246.5 = MJD 6.0

/tvb

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[time-nuts] Email address change

[Bill Riches]

As you have heard Verizon is canceling their email address operation.  I
don't know when but it will be soon.  My new email address will be

 

bill.ric...@gmail.com <mailto:bill.ric...@gmail.com> 

 

Please correct your address book.

 

Thank you.

 

Bill Riches, WA2DVU 

dB Electronics

Cape May Court House, NJ 08210

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Re: [time-nuts] Wildwood NJ ELoran

[Bill Riches]

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bill Riches
Sent: Friday, February 3, 2017 10:02 PM
To: 'Discussion of precise time and frequency measurement' <time-nuts@febo.com>
Subject: [time-nuts] Wildwood NJ ELoran

Here is a dropbox link to Eloran from xmitter at Wildwood, NJ.  I am 10 miles 
away and it is from my hp SA over a long average.

Spikes on trace were from a GPS power supply that has been corrected.


https://www.dropbox.com/s/gxa85mz00z5l0cp/eloran%20dec%208.jpg?dl=0

73,  Bill, WA2DVU
Cape May
-Original Message-


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[time-nuts] Wildwood NJ ELoran

[Bill Riches]

Here is a dropbox link to Eloran from xmitter at Wildwood, NJ.  I am 10 miles 
away and it is from my hp SA over a long average.


https://www.dropbox.com/s/gxa85mz00z5l0cp/eloran%20dec%208.jpg?dl=0

73,  Bill, WA2DVU
Cape May
-Original Message-


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Re: [time-nuts] eLoran test 6 Feb for almost 2 months

[Bill Riches]

100 khz.

73,

Bill, WA2DVU

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of John Marvin
Sent: Friday, February 3, 2017 1:21 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] eLoran test 6 Feb for almost 2 months

I don't have a Loran receiver, and I live in Colorado. But I'd still like to 
check late at night to see if I can see a signal on my SDR receiver. I tried 
looking at old posts, and did some research online, but the best I can tell is 
that Loran C (and I assume eLoran) is transmitted at around 100 Khz. Anyone 
know precisely what frequency(s) are used by the Wildwood eLOran station?

Regards,

John


On 2/2/2017 11:59 AM, paul swed wrote:
> Well this is nice almost a 2 month long test.
> So if you thought about seeing if you could receive eLoran on your 
> Loran C receiver this is a good opportunity. With respect to the data 
> channel pretty sure none of the receivers we have know or care about it.
>
> The Wildwood, NJ eLoran transmitter will be continuously broadcasting 
> from
> 0900 (EST) on 06 February 2017 through 1200 (EST) on 31 March 2017.
> Wildwood will be broadcasting as 8970 Master and Secondary most of the 
> time but occasionally may operate at other rates.
>
>
>
> Please note that the Loran Data Channel (LDC) will be undergoing 
> testing and may be unavailable or unreliable for short periods of time
>
> from 06-10 February 2017.
>
> Regards
> Paul
> WB8TSL
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Re: [time-nuts] Lady Heather Ver 5 Problem - full screen mode

[Bill Riches]

Just noticed by accident if you have a small screen mode if you click on the 
top of the screen and drag it up above the top of the monitor and release the 
mouse button it will change to full screen mode.  Learn something new every day!

73,

Bill, WA2DVU
Cape May


Ahhh, full screen mode... the demon mode from hell.  On most modern systems 
with large monitors it crashed the program.  It uses DirectDraw and if your 
DirectDraw implementation does not handle your monitor size, bye bye Heather.  
That means full screen mode (or clicking the MAXIMIZE button or pressing F11 
crashes Heather unless your monitor or graphics driver was a standard VGA era 
screen res like 640x480, 800x600, 1024x768, or 1280x1024). Only those four 
monitor widths allow full screen mode.  Monitor height is not check for.

Because pressing the MAXIMIZE button was quite easy to do accidentally,  full 
screen mode is disabled by default (but F11 can't be disabled).  If your 
monitor / graphics driver is one of the magic sizes you can enable full screen 
mode with the new /fu command.  For instance for a 1024x768 screen try:
   /fu /vm

If you have a larger monitor and can configure your display driver for one of 
the magic sizes, that works.

The /f command now brings up Heather in a windowed mode sized to fill (most of) 
the screen.  You can also do that with $f from the keyboard.

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Re: [time-nuts] Lady Heather Ver 5 Problem - full screen mode

[Bill Riches]

Took a while but found out that /vs /fu worked for me.  Slick!

Bill, WA2DVU

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims
Sent: Tuesday, December 13, 2016 1:06 AM
To: time-nuts@febo.com
Subject: [time-nuts] Lady Heather Ver 5 Problem - full screen mode

Ahhh, full screen mode... the demon mode from hell.  On most modern systems 
with large monitors it crashed the program.  It uses DirectDraw and if your 
DirectDraw implementation does not handle your monitor size, bye bye Heather.  
That means full screen mode (or clicking the MAXIMIZE button or pressing F11 
crashes Heather unless your monitor or graphics driver was a standard VGA era 
screen res like 640x480, 800x600, 1024x768, or 1280x1024). Only those four 
monitor widths allow full screen mode.  Monitor height is not check for.

Because pressing the MAXIMIZE button was quite easy to do accidentally,  full 
screen mode is disabled by default (but F11 can't be disabled).  If your 
monitor / graphics driver is one of the magic sizes you can enable full screen 
mode with the new /fu command.  For instance for a 1024x768 screen try:
   /fu /vm

If you have a larger monitor and can configure your display driver for one of 
the magic sizes, that works.

The /f command now brings up Heather in a windowed mode sized to fill (most of) 
the screen.  You can also do that with $f from the keyboard.

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Re: [time-nuts] LH "Life" readout

[Bill Riches]

I have another lucent in the shop and when I get back I will stick a laptop on 
it and see if that shows the correct life.  No big thing - just wondering if I 
was doing something wrong.

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims
Sent: Tuesday, December 13, 2016 12:42 AM
To: time-nuts@febo.com
Subject: [time-nuts] LH "Life" readout

Did you wait at least three hours for it to change?  it's working fine on mine. 
It has X98_4-A firmware.

---

> Lucent ref0 box working fine with LH.

Question - Life readout on LH reads 17832 hours and does not advance.  Life 
readout on Z3811.exe program reads 5943 hours and advances.

Is the life readout available for the Lucent box?
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Re: [time-nuts] LH "Life" readout

[Bill Riches]

Ran overnight - life has advanced to 17844. Will be away for 3 days and check 
it when I return.

Bill

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims
Sent: Tuesday, December 13, 2016 12:42 AM
To: time-nuts@febo.com
Subject: [time-nuts] LH "Life" readout

Did you wait at least three hours for it to change?  it's working fine on mine. 
It has X98_4-A firmware.

---

> Lucent ref0 box working fine with LH.

Question - Life readout on LH reads 17832 hours and does not advance.  Life 
readout on Z3811.exe program reads 5943 hours and advances.

Is the life readout available for the Lucent box?
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[time-nuts] LH "Life" readout

[Bill Riches]

Lucent ref0 box working fine with LH.

Question - Life readout on LH reads 17832 hours and does not advance.  Life 
readout on Z3811.exe program reads 5943 hours and advances.

Is the life readout available for the Lucent box?

73,

Bill, WA2DVU

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[time-nuts] rxx question

[Bill Riches]

LH works great with my lucent REF0 box.  I am using string  /4 /vs /tz=5.

When I enter /rxx=17  it corrects leap second but the screen changes from all 
of the data to just to clock info full screen.  How do I get the full data info 
back?

Is it possible to read the total life operating time from the REF0 box?

Thank you again for V5!


73,

Bill, WA2DVU
Cape May 

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Re: [time-nuts] Lady Heather for Z3801A (and other devices)

[Bill Riches]

Thank you Mark,  Spend time with your family this Thanksgiving.  We will all 
appreciate it when it does arrive.

73,

Bill, WA2DVU

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims
Sent: Wednesday, November 23, 2016 11:14 AM
To: time-nuts@febo.com
Subject: [time-nuts] Lady Heather for Z3801A (and other devices)

I had hoped to get the 5.0 release out last weekend but got distracted...   
this weekend for sure... maybe...  perhaps...
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Re: [time-nuts] Lady Heather for Z3801A (and other devices)

[Bill Riches]

Hi Paul,

Our LH Guru is working on an update for 3801 and 3811.  It will do all sort of 
things and even cook dinner.  He has not said when it will be available but it 
will be soon.

73,

Bill, WA2DVU
Cape May

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of paul swed
Sent: Wednesday, November 23, 2016 9:50 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lady Heather for Z3801A (and other devices)

Curious if the code for the z3801 was ever released?
Thanks
Paul
WB8TSL

On Mon, Sep 19, 2016 at 8:08 AM, Bill Riches <bill.ric...@verizon.net>
wrote:

> Hi Mark,
>
> Will it work with Z3811 (KS24361)
>
> 73,
>
> Bill, WA2DVU
> Cape May
>
>
> ___
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Re: [time-nuts] Newbie With a Z3801 Problem

[Bill Riches]

Hi Mark,

Thank you for working with the KS24361.  Looking forward to when the program 
will be available.  

Any ideas on being able to use the 1 PPS signal out of the KS24361 to drive SL 
sound card calibration?  It is a weird pulse and someone mentioned the timing 
is wrong.  I use the pulse out of a Jackson unit with SL and it works fine.

73, 

Bill, WA2DVU

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Re: [time-nuts] Lady Heather on MacOS X

[Bill Riches]

Hi Mark,
 If your Lucent KS unit does not come in soon let me know and I will still be 
glad to lend you one of my units with power supply to play with.  I have 
offered this several times in the past but did not hear from you.

73,

Bill, WA2DVu
Cape May


-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims
Sent: Sunday, October 2, 2016 11:16 PM
To: time-nuts@febo.com
Subject: [time-nuts] Lady Heather on MacOS X

I have the next release of Lady Heather working on macOS / OSX.  Seems to work 
quite well.  The makefile auto-detects Linux or macOS... (stupid Windoze make 
does not support conditionals so it needs its own makefile).  macOS does use 
XQuartz for the X11 video/mouse/keyboard stuff.  XQuartz does have a couple of 
quirks... mainly you can't restore the previous window size if you maximize the 
window then try to restore it.

I just got through cleaning up the OS support code and decoupled the operating 
system relevant code (#ifdef WINDOWS,  #ifdef __linux__, and #ifdef __MACH__) 
code from the video/mouse/keyboard code (#ifdef WIN_VFX and #ifdef USE_X11).  
Also made the drawing routines much less display system dependent.  This should 
make it easier to port to other systems and display managers.  Windows, Linux, 
and Mac should cover 99.9% of users.   I suspect BSD support would be trivial 
since mscOS is based on BSD (and Heather only has a couple dozen lines of code 
specific to macOS).

I also deleted all the old DOS support code.  Heather had gotten way to beefy 
for that to ever work again.

The next release should be out in a couple of weeks... I'm waiting for a Lucent 
KS system to come in and verify it works with that, 
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Re: [time-nuts] Lucent RFTFm-II-XO

[Bill Riches]

Hi Charles,

Thanks for info - makes sense.  With SL Lucent pulse did not work - Jackson 
unit did with no mods.  Guess I was lucky!

73,

Bill, WA2DVU

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Charles 
Steinmetz
Sent: Thursday, September 22, 2016 3:48 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lucent RFTFm-II-XO

Bill wrote:

> If you could,  would you see if you can take the pps out of your lucent box 
> and use it to sync the pc sound card clock via continuous calibration for  
> using SL for fx measurements.  Maybe by lucent box pps output is bad.

The PPS directly out of most GPSDOs is too fast for sound cards.  But once you 
stretch it, there is another problem.  Assuming 5v logic, and knowing that the 
sound card is AC coupled, the leading edge of the (assumed positive-going) 
pulse will produce a 5v spike that decays over a time period that depends on 
the post-capacitor DC resistance inside the sound card.  It might decay fully 
(back to 0v) during the pulse, or less than that.

The falling edge of the pulse will generate a negative-going spike with a peak 
negative voltage of [decayed voltage after leading edge minus 5v].  This could 
be anywhere from just slightly negative to the full logic supply (if the 
post-capacitor voltage decays fully before the falling edge occurs).  The same 
would be true for 3.3v logic, substituting "3.3" for "5" above.

These peak voltages are way outside the input range of most sound cards, so the 
positive spike is almost certainly going to overload the ADC, with 
unpredictable (and, very likely, unfortunate) results.

At the very least, you will need some sort of sound-card oscilloscope program 
so you can see what the sound card is actually capturing.  Then you can start 
shaping your trigger pulses (with voltage clamping and possibly LP filtering) 
to give predictable and stable results.

Best regards,

Charles


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Re: [time-nuts] Lucent RFTFm-II-XO

[Bill Riches]

Hi Bob,

If you could,  would you see if you can take the pps out of your lucent box and 
use it to sync the pc sound card clock via continuous calibration for  using SL 
for fx measurements.  Maybe by lucent box pps output is bad.

15625 from 3586 goes in one channel and pps goes into the other channel of the 
sound card and SL does its magic.

73, 

Bill, WA2DVU
Cape May

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp
Sent: Thursday, September 22, 2016 12:55 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent RFTFm-II-XO

Hi

I have had no problem using the PPS out of any of the Lucent boxes. They 
trigger counters fine and a one shot stretches them to any length you might 
need.

Bob

> On Sep 22, 2016, at 8:31 AM, Bill Riches <bill.ric...@verizon.net> wrote:
> 
> Be careful of the pps output from the dual lucent boxes.  Tried to use it to 
> sync SL and found that it is a weird non-standard pulse and would not work 
> even with a pulse stretcher as it looked too narrow.  I use the pps output 
> from a Jackson unit and it syncs SL fine.
> 
> 73,
> 
> Bill, WA2DVU
> Cape May
> 
> -Original Message-
> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal 
> Murray
> Sent: Thursday, September 22, 2016 2:07 AM
> To: Discussion of precise time and frequency measurement
> Cc: hmur...@megapathdsl.net
> Subject: Re: [time-nuts] Lucent RFTFm-II-XO
> 
>> Is there a pinout posted somewhere  for the Lucent box RS422 D sub 9 
>> connector?
> 
> It's in the mail archives.  Google for something like >time-nuts RS422 
> pinout<
> 
> If you are interested in timing, you want the PPS signal too.  (It 
> won't be great over USB, but it might be fun to play with.  You can 
> get your own hanging bridges.)
> 
> 
> 
> --
> These are my opinions.  I hate spam.
> 
> 
> 
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> 
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Re: [time-nuts] Lucent RFTFm-II-XO

[Bill Riches]

Be careful of the pps output from the dual lucent boxes.  Tried to use it to 
sync SL and found that it is a weird non-standard pulse and would not work even 
with a pulse stretcher as it looked too narrow.  I use the pps output from a 
Jackson unit and it syncs SL fine.

73,

Bill, WA2DVU
Cape May

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Hal Murray
Sent: Thursday, September 22, 2016 2:07 AM
To: Discussion of precise time and frequency measurement
Cc: hmur...@megapathdsl.net
Subject: Re: [time-nuts] Lucent RFTFm-II-XO

> Is there a pinout posted somewhere  for the Lucent box RS422 D sub 9 
> connector?

It's in the mail archives.  Google for something like >time-nuts RS422 pinout<

If you are interested in timing, you want the PPS signal too.  (It won't be 
great over USB, but it might be fun to play with.  You can get your own hanging 
bridges.)



--
These are my opinions.  I hate spam.



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Re: [time-nuts] Lady Heather for Z3801A (and other devices)

[Bill Riches]

Hi Mark,

Will it work with Z3811 (KS24361)

73,

Bill, WA2DVU
Cape May


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Re: [time-nuts] Venus838LPx-T opinions?

[Bill Riches]

Hi Mark,

If you are ever interested in playing with the Lucent boxes (Z3811, Z3812) I 
would be glad to send you a working system to play with.  Sure would like to 
use LH with it.

73,

Bill, WA2DVU
Cape May, NJ

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Mark Sims
Sent: Sunday, July 24, 2016 7:34 PM
To: time-nuts@febo.com
Subject: [time-nuts] Venus838LPx-T opinions?

The closest thing to an official Lady Heather site if John Mile's ke5fx.com
I also want to put it it up on Github when the code settles down some.

The good Lady Heather doesn't accept donations of the monetary kind.   
Receivers not currently hoarded in her dungeon are appreciated.  Particularly 
interested in RFTG-M,  Z3805. Z3815, Z3816, and HP53xxx at the moment (or 
somebody to test them).  Code is in there for working with these, but it has 
never been tested on a real device (and SCPI tends to be rather picky about 
just how you have to talk to it).

---
Questions still remain:

1) What is the link to the "official" Lady Heather site?
2) How/where can we shoot a donation to say "Thanks!"?


  
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Re: [time-nuts] Lucent KS-24361 GPSDO arrived today several questions

[Bill Riches]

Hi Bob and group,

Where are you obtaining Satstat and what windoze version will it work on?  XP, 
W7 32 or 64 bit?  XP I guess?

Bill Riches
Cape May

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Stewart
Sent: Friday, November 07, 2014 12:03 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent KS-24361 GPSDO arrived today several questions

Hi Bob,
I've been using the Satstat program to send commands.  What I don't understand 
is why the slave will accept commands such as sat elevation angle and not give 
an error response.  It gives a response of command complete, but it doesn't 
change it.  Or is that an indication that both units use the same firmware, and 
success is actually indicated by the resulting change of the angle?

Bob From: Bob Camp kb...@n1k.org
 To: gandal...@aol.com; Discussion of precise time and frequency measurement 
time-nuts@febo.com
 Sent: Thursday, November 6, 2014 6:07 PM
 Subject: Re: [time-nuts] Lucent KS-24361 GPSDO arrived today several questions


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Re: [time-nuts] Z3812 Diag port data? RE: time-nuts Digest, Vol 124, Issue 26

[Bill Riches]

Just loaded Satstat and found that it would not work with windoze 7 64 bit.  Is 
there a 64 bit version around or do I dig out an old xp machine - or what 
program has been found to work?

Bill, WA2DVU
Cape May



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Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system

[Bill Riches]

System has been fired up for about 48 hours and seems to have settled down a 
bit by watching scope trace movement between Lucent and thunderbolt (has been 
on for months).

I hooked up Lucent to input of 3586 (sync with thundebolt) and measured 15625 
khz with spectrum lab for 8 hours - sample every 15 min. 

In the excel printout of 15625 data I subtracted 15625 to get hz error.  
Totaled hz error for all samples - divided total by number of samples and got 
average hz error.

Then divided 10 MHZ by the average error and got an error of 1.6x10-11.  This 
computed error also includes pc sound card error.


Just wondering - if sound card error were corrected would this procedure be 
close to measuring the difference between two GPS units?  If so - how close 
would two GPS units be in FX?


Any ideas on getting better control of the pc sound card osc via SL? PC has 
been on for 24 hours and am measuring 15625 from gps locked 3336 into SL just 
to see how bad sound card osc is.

I sure do appreciate all the info on our toys.

73,

Bill, WA2DVU
Cape May


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Re: [time-nuts] 1903 Railroad self-Winding / Self-setting Clock

[Bill Riches]

I have the wall mounted version. I believe that the hour adjust solenoid
took 100 volts or so.  I will check my manual on the clock.  At a minute
before the top of the hour until a minute after the hour all traffic would
stop on the WU lines and at the top of the hour a 100 v dc pulse came over
the lines to reset the time.  I believe it was in the 30s when WU decided
they did not want to be in the time business and discontinued the service
and said everyone could keep their clocks.  I can imagine the next day
clocks going home with office workers.  WU charged a buck a month for the
clock, service, and batteries.  Many large offices had hundreds of these
clocks.

The book American Clocks -Volume 2 by Tran Duyly has everything you ever
wanted to know about self winding clocks.

73,

Bill, WA2DVU
Cape May



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Re: [time-nuts] 1903 Railroad self-Winding / Self-setting Clock

[Bill Riches]

Book info amazon

http://www.amazon.com/American-Clocks-Volume-Special-Self-Winding/dp/0930163
443/ref=sr_1_sc_3?ie=UTF8qid=1414869823sr=8-3-spellkeywords=american+cloc
ks+tran+duyly

73,

Bill, WA2DVU


Bill I responded to Mike there seems to be a number of threads running on
this.
So in fact you do have the telegraph coil in the clock. Makes sense to me.
Thats why the 100 V they needed to drive 10-20 ma through the coil over
distance and had to account for line loss.
The boook you mention. Online?
Regards
Paul
WB8TSL



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Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system

[Bill Riches]

Hi Bob,

I connected 10 MHZ test jack output to a 15 db el-cheepo CATV amp and the 
output of that to a 4 way splitter.  Splitter outputs went to 3336-3586 and 
counter.  All seem to like the ref signal.  Output of the amp takes makes the 
semi-square wave into a sick saw tooth.  Amp is only rated from 50 to 500 mhz 
so strange things are happening with 10 MHZ input.  Other CATV amps do have 
better low fx response - will play with that later.

I have 10 mhz pulse from Lucent into trigger input of 465 scope and Thunderbolt 
gps output into vertical input of scope.  Time base is set for .01 Usec per 
div. I notice that trace moves right to left then left to right about every 5 
min or so.  Moves about 3 div before changing directions.  Why?  Is the Lucent 
still making a list?  It has only been on for a few hours.  It takes about 10 
min for GPS to go out from a cold start. (My Thunderbolt and RB do not change 
direction when using one as trigger and the other for vert input to scope)

I ordered a USB to RS422 converter cable - will be here next week.  What 
program is sort of working?  Using Windoze 7 64bit and have an old XP machine 
available.

Sure do appreciate all the info from our time nuts gurus!

73,

Bill, WA2DVU
Cape May, NJ


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Re: [time-nuts] Lucent KS-24361, HP/Symmetricom Z3809A, Z3810A, Z3811A, Z3812A GPSDO system

[Bill Riches]

My system arrived today in original unopened boxes.  Hooked up 24 volts and
a gps antenna and it locked in about an hour and 10 MHZ output as compared
with thunderbolt GPS seems to be working just great.  No trace movement on
scope using thunderbolt as trigger and looking at Lucent 10 MHZ output.
Strange output pulse!  Looking forward to 10 MHZ sine wave output mod that
the gurus on the list will discover.

Wonder what these units cost new when they were built?

73,

Bill, WA2DVU
Cape May, NJ


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Re: [time-nuts] Lucent KS-24361/Z3812A GPSDO initial setup

[Bill Riches]

Hi Bob,  

I was just going to say it would be cool if Lady Heather eventually would work. 
 You read my mind.  I can hope!!


73,

Bill, WA2DVU
Cape May

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Bob Camp
Sent: Saturday, October 25, 2014 12:12 PM
To: Bob Stewart; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Lucent KS-24361/Z3812A GPSDO initial setup

Hi

If 

6) Lady Heather does not play well with one :(

My guess is that the Z3805 has pretty much the same “stuff” in it. They both 
come from the same era and (may) have the same MTI OCXO in them.

Bob


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Re: [time-nuts] LTE-Lite module

[Bill Riches]

Hi Said,

Thank you for taking the time to answer questions and provide info on the LTE 
unit to our group.  I know we will not add much to your bottom line as we are a 
small group.  We have come a long way with Thunderbolt without any help 
whatsoever with that company.  Will be an interesting ride with your products!

73,

Bill, WA2DVU
Cape May, NJ

-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Said Jackson 
via time-nuts
Sent: Saturday, October 18, 2014 6:53 PM
To: Bill Dailey
Cc: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] LTE-Lite module

Hi Bill,

I think it makes perfect sense. But I have no idea how the units' loop 
stability would be with the 10811. That kind of testing is on the plate.

You would preferably set the OCXO to a nominal tuning voltage of 1.5V using the 
mechanical adjustment, then let the LTE Lite do the rest.

Please note that the LTE board will auto-sense the external ocxo frequency, so 
any of the boards would work.

Please also note that due to the harmonic mixing issues I described earlier the 
best board to use for that setup would be the 19.2MHz version(!) or to remove 
the on-board tcxo altogether.

Bye,
Said

Sent From iPhone

 On Oct 18, 2014, at 15:24, Bill Dailey docdai...@gmail.com wrote:
 
 Said,
 
 How tough would it be to mate the 10Mhz version up to a really good 10811?  I 
 have one that I acquired from Corby some time ago.  I was going to spin my 
 own but I wont realistically get to that with everything else I have going 
 on.  I was thinking of throwing the LTE-Lite and  the 10811 in a box.  I 
 woudl then have a stock fury, An enhanced OEM fury (datum-c) and then 
 this gadget with a 10-13 10811.  Let me know if this doesnt make sense.  I am 
 an amateur.
 
 Bill
 
 On Sat, Oct 18, 2014 at 5:13 PM, S. Jackson via time-nuts 
 time-nuts@febo.com wrote:
 Guys,
 
 one last email. The board will not fit into the Hammond enclosure 
 without reworking the enclosure or removing the TCXO socket. We 
 initially planned to  ship the board without the socket, now all of 
 them will have it. The board was designed to be used without the 
 TCXO/Socket to fit into that enclosure.
 
 Caveat: please expect some rework to be necessary when using the  
 suggested Hammond enclosure.
 
 bye,
 Said
 
 
 In a message dated 10/18/2014 12:56:06 Pacific Daylight Time, 
 time-nuts@febo.com writes:
 
 
 Guys,
 we have been getting a good number of emails with  questions  that 
 have already been addressed in the user manual or the  FAQ, see the  below 
 link.
 We
 spent a lot of time putting the  collateral together, may I please  
 ask that you first look into these  two documents to see if your 
 question might already be addressed  there?
 Paul,
 please search the LTE Lite user manual for Hammond and  you will  
 find it
 there:
 http://www.jackson-labs.com/index.php/products/lte_lite
 Thanks,
 Said
 _
 Do you have a recommended  Hammond chassis part  number?
 --
 Paul
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 --
 Doc
 
 Bill Dailey
 KXØO
  
 
 

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Re: [time-nuts] Cutler NAA on 24.0kHz....

[Bill Riches]

NAA -50 dbm  (1 MV) using a mini-whip.  -60 dbm on the k9ay loop. Mini-whip
is full of surprises.

73,

Bill, WA2DVU
Cape May, NJ

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Tuesday, August 19, 2014 9:51 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Cutler NAA on 24.0kHz

Did measure NAA near Boston 8000uv using a dipole for 80 meters.
Looking at various vlf receivers it looks like a LPF or maybe a BPF filter
to a ne602 mixer followed by a tl081opamp LPF makes a direct conversion
receiver. Then hit the tracor d-msk-r.
Regards
Paul
WB8TSL


On Mon, Aug 18, 2014 at 2:34 PM, Charles Steinmetz csteinm...@yandex.com
wrote:

 Paul wrote:

  Nat Semi App Note 72 page 18, par. 6.4 shows the configuration for
 bandpass active filter.  This matches the last LM3900 stage, so you 
 would seem to be correct.  The shift in filter frequency for 200bps 
 is because the higher modulation rate results in a greater frequency 
 shift. It's like 50hz instead of the 25hz of the 100bps rate.

 Robert wrote:

  It's simple, but not obvious. The LM3900 is a Norton amplifier, and
 while it has differential inputs they are current driven.   *  *  *
Both
 the upper amplifier and the second lower amplifier have 1M feedback 
 resistors, and + inputs fed 10V by 1M bias resistors. That would 
 bias the output at near the supply rail, turning these stages into 
 something like half-wave rectifiers. Since the first lower stage has a
2M bias resistor it
 idles at about half supply, and behaves as a simple inverter.   *  *  *
 combining the two outputs produces a negative going full wave 
 rectification of the signal. The fourth LM3900 stage looks like an 
 inverting bandpass filter, but I'd have to dig out some reference 
 books to determine its behavior in more detail. As f or the 100-200 
 switch I'm confused, why would the bandpass frequency be lowered for the
higher modulation rate?


 The circuit as a whole operates as a frequency doubler using full-wave 
 rectification and filtering.  The rx LO is 100Hz below the nominal 
 carrier frequency, so in normal (non-MSK) mode, the IF frequency is
100Hz.
 Referring to the MSK addendum, a received 200 baud MSK signal is 50Hz 
 below nominal, and a 100 baud MSK signal is 25Hz below nominal.  With 
 the LO 100 Hz below nominal, this makes the IF frequency 50Hz when 
 receiving a 200 baud MSK signal, and 75 Hz when receiving a 100 baud 
 MSK signal.  After doubling, these become 100 Hz (200 baud) and 150 Hz 
 (100 baud), so the BPF is switchable between 100Hz and 150Hz.  They 
 used a FET to chop the 150Hz
 (100 baud) signal with a 50Hz square wave.

 I can't say I'm impressed with the design, even for the era.  The 
 whole instrument is built mostly with LM3900s, which makes it 
 thousands (maybe even millions) of times noisier than it would be if 
 it had been properly designed with standard op-amps.  It may work more 
 or less, but it's a fugly way to get there.  There are other 
 questionable choices (like the FET chopper, an overall design that 
 depends on lots of one-shots, etc.).  The designers knew about the 
 LM301 (there is one in the unit), so there was really no excuse for 
 using LM3900s.  Yeah, the 301 was more expensive -- but this was 
 supposed to be a state-of-the-art measuring device for characterizing good
OCXOs down to PPB or below.

 I simulated the MSK board in LTspice.  Let me know (OFFLIST ONLY, 
 please) if you would like the files to play with (662kB ZIP file).  
 (Note that these won't do you any good if you're not an LTspice user.)  
 Again, please do not clutter the list with requests for files -- 
 OFFLIST ONLY, please (check your headers carefully before you hit Send).

 Best regards,

 Charles




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[time-nuts] Wildwood Loran

[Bill Riches]

Wildwood is up as of 1300 Z March 3, 2014.  We are in the middle of a lot of
snow!  Estimated to receive a foot or so. Yippie...



73,

 

Bill, WA2DVU

Cape May

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Re: [time-nuts] LORAN C 89700 on the air starting Monday

[Bill Riches]

Hi Paul,

Is that EST or GMT time?

73,

Bill, WA2DVU
Cape May, NJ ( 10 miles from Wildwood!)

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Saturday, March 01, 2014 12:18 PM
To: Time-nuts
Subject: [time-nuts] LORAN C 89700 on the air starting Monday

Wildwood will be on air from approximately 1400 on 02 March until 1400 on 04
March Regards Paul WB8TSL ___
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Re: [time-nuts] Loran

[Bill Riches]

Wildwood is still up at 0100 z 11/17.  Guess they are running all weekend.

73,

Bill, WA2DVU
Cape May, NJ



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Re: [time-nuts] Loran

[Bill Riches]

Not wildwood - I am 5 miles away from wildwood - I heard it and it was about
an s1

73,

Bill, WA2DVu
Cape May

Can you tell whether it is coming from Wildwood or another site?

David N1HAC

re.


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Re: [time-nuts] Loran

[Bill Riches]

Hi Paul,

I stand corrected!  Wildwood is up at 1615 now - 30/9!  Beer call at 1700!

My last comment was in regards to the last evening activity that was not
Wildwood.

73,

Bill, WA2DVU
Cape May

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Friday, November 15, 2013 1:49 PM
To: David McGaw; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Loran

And by the way it is still on as of 2pm est.
Now the real test. They seem to go home for the weekend and beer time is
typically 5pm or so.
Will it still be on at 8pm? Curious minds want to know.
Regards
Paul
WB8TSL


On Fri, Nov 15, 2013 at 1:47 PM, paul swed paulsw...@gmail.com wrote:

 I can only go by the press release that was above and would guess its 
 wildwood.
 Its clearly not in ma. That used to hit me with a heck of a signal 
 1000uv plus


 On Fri, Nov 15, 2013 at 10:22 AM, David McGaw
n1...@alum.dartmouth.orgwrote:

 Can you tell whether it is coming from Wildwood or another site?

 David N1HAC



 On 11/14/13 9:02 PM, paul swed wrote:

 Sounds pretty good not banging in here like the old chain did.
 austron 2100 says 38db
 srs700 says 47 rcvr gain and 25 db noise margin.
 hp3856b's says -53dbm or 500uv.

 Regards
 Paul
 WB8TSL




 On Thu, Nov 14, 2013 at 5:40 PM, J. Forster j...@quikus.com wrote:

  What's the signal strength like?

 -John

 ===



  Oh that is indeed interesting that they are moving forward.
 The GRI is 89700.
 SRS700 locked and looking good.
 Just brought the Austron 2100 and 2100F on line.
 The 2100 is tied to the local RB and the f is tied to the HP3801.
 The SRS700 looks at the RB.
 I pulled the Austron 2000 out of the rack several months ago.
 Needed the space.
 Regards
 Paul
 WB8TSL. Near Boston.


 On Thu, Nov 14, 2013 at 2:41 PM, Tom Van Baak t...@leapsecond.com

 wrote:

 Well lets see. Just warming up the srs700.
 UrsaNav must have received some support $ Regards Paul WB8TSL

 Paul,

 See below, via Adobe OCR on a JPG press release:

 ---

 From: UrsaNav Press Contact
 Sent: Thursday, November 14, 2013 10:31 AM
 Subject: UrsaNav Accepts eLoran Transmitter from Nautel

 UrsaNav News Release November 14, 2013

 Two Companies - One Dream

 UrsaNav Accepts Delivery of First Production Nautel NlAO eLoran 
 Transmitter

 Bedford, Massachusetts, USA.- After extensive Final Acceptance 
 Testing at Nautel's Hackett's Cove, NS facility, UrsaNav has 
 accepted delivery of the first production NL40 Loran-C and 
 Enhanced Loran (eLoran) transmitter.
 This
 seventh generation Loran transmitter technology is the 
 culmination of over six years of collaborative development 
 between the two companies.

 The transmitter successfully met or exceeded all of the 
 requirements of the u.s. Coast Guard Specification of the 
 Transmitted Loran-C Signal.
 Testing was conducted into a simulated antenna matching the 
 characteristics of a u.s. Coast Guard standard 625-foot 
 Top-Loaded Monopole. The NL-Series transmitters are capable of 
 transmitting Loran-C, eLoran, Chayka, and eChayka in any 
 combination at power levels exceeding one megawatt.
 They
 are qualified for today, and prepared for tomorrow.

 UrsaNav's President, Charles Schue, shown accepting the 
 transmitter from Nautel's President, Peter Conlon, commented: 
 Resilient PNT begins with complementary technologies, layered 
 one upon the other in such a way that the user is ensured 
 improved continuity of operations over a sole-source solution. 
 eLoran is the terrestrial coprimary complement to GNSS, and our 
 technology makes eLoran the most economical, efficient, and 
 wide-area alternative when GNSS is not available.

 UrsaNav provides the world's most advanced solutions for Low 
 Frequency Alternative Positioning, Navigation, Timing, and Data, 
 including high-performance eLoran Receiver, Command and Control, 
 and Differential Loran technology. We are the exclusive, global, 
 reseller of Nautel's industry-leading, high-power, Low Frequency 
 transmitters for Loran/eLoran and Chayka/eChayka.

 ---
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Re: [time-nuts] OCXO Adjustment Question

[Bill Riches]

This is the method I use for my 5110. There are two 10 mhz outputs on the
osc - you can unplug one of the plugs and use a 10x probe there. My unit
will hold a couple  of parts in 
10-8 for months.

73,

Bill, WA2DVU
Cape May, NJ

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of J. L. Trantham
Sent: Tuesday, May 07, 2013 11:52 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] OCXO Adjustment Question

Fred,

What I do is to apply the GPSDO to the trigger input of a scope and the
output of the OCXO to be adjusted to the vertical input of the scope.  Set
the time base to something line 100 nSec or faster and watch the output of
the OCXO after it has warmed up for 30 minutes or so.  

This is an option only if you have an output from the OCXO you can watch.
If no output, try a x10 probe attached to a 10 MHz connection from the OCXO
inside the monitor.  However, be careful that the probe does not 'load' the
OCXO and shift the frequency.

Adjust the OCXO for a stable display, not drifting left or right.

If the sine wave (or square wave) is moving to the left, the OCXO is high in
frequency.  If it is moving to the right, the OCXO is low in frequency.  If
stable, it is matched to the GPSDO.  This is useful as long as the OCXO and
GPSDO are within a few Hz of each other.  The amount of time it takes for
the display to shift 1 cycle tells you how close the OCXO is to the GPSDO.

For instance, if it takes 10 seconds for the display to shift one cycle,
100,000,000 +/- 1 cycles went by in that 10 seconds or 1 part in 10E9 if I
have my math correct.

Joe

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Frederick Bray
Sent: Tuesday, May 07, 2013 9:25 PM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] OCXO Adjustment Question

This might be slightly off-topic, but probably there is a time-nut who knows
the answer.

I am trying to adjust the 10 MHz OCXO in a Cushman 5110 service monitor.  I
am using a frequency counter driven by a GPSDO.  Perhaps someone can educate
me about a couple problems I am encountering.

I tried making small incremental adjustments but after I am done, the
frequency drifts several Hz and then re-stabilizes at a new value.  When I
make further adjustments, I notice strange behavior. For example, if I
initially turned the adjustment clockwise to increase the frequency, it will
now decrease if I turn it clockwise and increase if I turn it
counter-clockwise.  On the next adjustment, it will reverse again.

Is there some correct procedure to adjust an OCXO?

Many thanks for any suggestions.

Fred Bray
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Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

[Bill Riches]

Hi Paul,

I thought I was receiving Wildwood which is 3 miles or so away but
apparently not.  I nulled out the sig with my LFL1010 loop and get a null
about 30 degrees which is toward Boston but maybe it could be Seneca after
figuring antenna error and Mag variation.  Signal strength with the loop
max is -40 db and null is -60 dbm. I did a conversion and comparison using
my icom 7600 and HP3336 sig gen.  Measuring with the HP 3586 did not agree
with the previous method - I imagine the modulation screws up its reading.
I will play around with the Perseus later and see what that reads.  So - My
question is - what stations are you copying?  I will continue to see if
Wildwood comes up again.  My contact with Wildwood has left the room!

73,

Bill, WA2DVU
Cape May, NJU 



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Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

[Bill Riches]

OK Stan,

What stations are you receiving - not GRI numbers but locations!

Bill Riches
Cape May

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Stan, W1LE
Sent: Tuesday, February 05, 2013 12:52 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

at 17:45Z, after 27 hours of continuous lock:
freq offset is now -2.1E-12 and has been as low as -7E-13, compared to
T'Bolt 10 MHz.
Master station is at 59 dB, slave is at 63 dB signal strength.

Stan,W1LE   Cape Cod


On 2/5/2013 12:12 PM, Bill Riches wrote:
 Hi Paul,

 I thought I was receiving Wildwood which is 3 miles or so away but 
 apparently not.  I nulled out the sig with my LFL1010 loop and get a 
 null about 30 degrees which is toward Boston but maybe it could be 
 Seneca after figuring antenna error and Mag variation.  Signal 
 strength with the loop max is -40 db and null is -60 dbm. I did a 
 conversion and comparison using my icom 7600 and HP3336 sig gen.  
 Measuring with the HP 3586 did not agree with the previous method - I
imagine the modulation screws up its reading.
 I will play around with the Perseus later and see what that reads.  So 
 - My question is - what stations are you copying?  I will continue to 
 see if Wildwood comes up again.  My contact with Wildwood has left the
room!

 73,

 Bill, WA2DVU
 Cape May, NJU



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Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

[Bill Riches]

At first I assumed it was Wildwood because of the strong signal but the loop
nulled out to the north, not to the east where Wildwood is.  After lunch I
will take the portable rx over to the antenna site and see if it is in fact
the tx.

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Tuesday, February 05, 2013 1:16 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

There isn't a way to tell what station it is. Its just the gri rate with a
delay to the x station.
But I assume its the same actual modulator and site.
My 2 cents.
Regards
Paul.

On Tue, Feb 5, 2013 at 1:06 PM, Bill Riches bill.ric...@verizon.net wrote:

 OK Stan,

 What stations are you receiving - not GRI numbers but locations!

 Bill Riches
 Cape May

 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] 
 On Behalf Of Stan, W1LE
 Sent: Tuesday, February 05, 2013 12:52 PM
 To: Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

 at 17:45Z, after 27 hours of continuous lock:
 freq offset is now -2.1E-12 and has been as low as -7E-13, compared to 
 T'Bolt 10 MHz.
 Master station is at 59 dB, slave is at 63 dB signal strength.

 Stan,W1LE   Cape Cod


 On 2/5/2013 12:12 PM, Bill Riches wrote:
  Hi Paul,
 
  I thought I was receiving Wildwood which is 3 miles or so away but 
  apparently not.  I nulled out the sig with my LFL1010 loop and get a 
  null about 30 degrees which is toward Boston but maybe it could be 
  Seneca after figuring antenna error and Mag variation.  Signal 
  strength with the loop max is -40 db and null is -60 dbm. I did a 
  conversion and comparison using my icom 7600 and HP3336 sig gen.
  Measuring with the HP 3586 did not agree with the previous method - 
  I
 imagine the modulation screws up its reading.
  I will play around with the Perseus later and see what that reads.  
  So
  - My question is - what stations are you copying?  I will continue 
  to see if Wildwood comes up again.  My contact with Wildwood has 
  left the
 room!
 
  73,
 
  Bill, WA2DVU
  Cape May, NJU
 
 
 
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Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

[Bill Riches]

Old rate numbers for Wildwood on web site were 9930 9960 and 8090.  That
info is probably past history.

Bill Riches

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Tuesday, February 05, 2013 1:16 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

There isn't a way to tell what station it is. Its just the gri rate with a
delay to the x station.
But I assume its the same actual modulator and site.
My 2 cents.
Regards
Paul.

On Tue, Feb 5, 2013 at 1:06 PM, Bill Riches bill.ric...@verizon.net wrote:

 OK Stan,

 What stations are you receiving - not GRI numbers but locations!

 Bill Riches
 Cape May

 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] 
 On Behalf Of Stan, W1LE
 Sent: Tuesday, February 05, 2013 12:52 PM
 To: Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

 at 17:45Z, after 27 hours of continuous lock:
 freq offset is now -2.1E-12 and has been as low as -7E-13, compared to 
 T'Bolt 10 MHz.
 Master station is at 59 dB, slave is at 63 dB signal strength.

 Stan,W1LE   Cape Cod


 On 2/5/2013 12:12 PM, Bill Riches wrote:
  Hi Paul,
 
  I thought I was receiving Wildwood which is 3 miles or so away but 
  apparently not.  I nulled out the sig with my LFL1010 loop and get a 
  null about 30 degrees which is toward Boston but maybe it could be 
  Seneca after figuring antenna error and Mag variation.  Signal 
  strength with the loop max is -40 db and null is -60 dbm. I did a 
  conversion and comparison using my icom 7600 and HP3336 sig gen.
  Measuring with the HP 3586 did not agree with the previous method - 
  I
 imagine the modulation screws up its reading.
  I will play around with the Perseus later and see what that reads.  
  So
  - My question is - what stations are you copying?  I will continue 
  to see if Wildwood comes up again.  My contact with Wildwood has 
  left the
 room!
 
  73,
 
  Bill, WA2DVU
  Cape May, NJU
 
 
 
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Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

[Bill Riches]

Hi Stan,

Now I am confused!!  I have an 857 and 80 - 6 screwdriver in my car.  Tuned
it up on 3800, then looked at broadcast band - Distant stations 500 - 600
khz were coming in aboug s9.  Heard 100khz about s1 - qth is 9 miles line of
site from wildwood tower.  Drove to Wildwood and down to the old engineering
station that has been abandoned and turned into a nature trail.  Drove out
to Loran gate - 500 feet from tower sig was up to S9.  Thought it would be
stronger. No one around but left my qsl card with a note -n Call me, I have
questions! and my phone number in the gate access box.  Will see if I get a
call.  

I have a Wellbrook 1010 loop at 20 feet and am getting a null at about 30
degrees when receiving 100 khz.  I checked null on a Wildwood AM station on
1230 and it is at 135 degrees so I know the loop is working.

When I approached the tower I thought I should have a real strong signal but
it only went up to about s9.  I now think that Wildwood is not on the air
and the increase in signal was being close to the 625 foot tower and it was
acting as a passive repeater since it is resonant to 100 khz.  So what loran
station could be on the air at about 30 degrees or so from Cape May Court
House, NJ 39 05 N  74 51 W Tower is 38 57 N  74 52 W.  Mileage 9 miles and
185 deg from me.





-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Stan, W1LE
Sent: Tuesday, February 05, 2013 1:25 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Hello Bill,

I have no real idea. I can not DF at this time. Antenna is an omni.

I suspect the FS700 receiver looks at GRI data and placement within the
waveform and goes to a look up table in firmware to tell me the supposed
location to the LORAN plan 10 years ago.

Only thing that may be possible is the RX signal strengths are different for
master and slave, so they may be physically separated or their TX RF is from
one location at different power levels.

It will be interesting what your contact at Wildwood (NJ) has to say.

Stan, W1LE   Cape Cod


On 2/5/2013 1:06 PM, Bill Riches wrote:
 OK Stan,

 What stations are you receiving - not GRI numbers but locations!

 Bill Riches
 Cape May

 -

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Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

[Bill Riches]

come on Paul - you need another project!

73

B

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Tuesday, February 05, 2013 9:30 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

Oh what a detour. It sounds like I may need to build a small loop stick
antenna to see what that may do. I would agree that if you were at the
station your needle or meter should have been pegged. I really don't need
another project right now. :-) Regards Paul.

On Tue, Feb 5, 2013 at 3:44 PM, Bill Riches bill.ric...@verizon.net wrote:

 Hi Stan,

 Now I am confused!!  I have an 857 and 80 - 6 screwdriver in my car.  
 Tuned it up on 3800, then looked at broadcast band - Distant stations 
 500 - 600 khz were coming in aboug s9.  Heard 100khz about s1 - qth is 
 9 miles line of site from wildwood tower.  Drove to Wildwood and down 
 to the old engineering station that has been abandoned and turned into 
 a nature trail.  Drove out to Loran gate - 500 feet from tower sig was 
 up to S9.  Thought it would be stronger. No one around but left my qsl 
 card with a note -n Call me, I have questions! and my phone number 
 in the gate access box.  Will see if I get a call.

 I have a Wellbrook 1010 loop at 20 feet and am getting a null at about 
 30 degrees when receiving 100 khz.  I checked null on a Wildwood AM 
 station on
 1230 and it is at 135 degrees so I know the loop is working.

 When I approached the tower I thought I should have a real strong 
 signal but it only went up to about s9.  I now think that Wildwood is 
 not on the air and the increase in signal was being close to the 625 
 foot tower and it was acting as a passive repeater since it is 
 resonant to 100 khz.  So what loran station could be on the air at 
 about 30 degrees or so from Cape May Court House, NJ 39 05 N  74 51 W 
 Tower is 38 57 N  74 52 W.  Mileage 9 miles and
 185 deg from me.





 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] 
 On Behalf Of Stan, W1LE
 Sent: Tuesday, February 05, 2013 1:25 PM
 To: Discussion of precise time and frequency measurement
 Subject: Re: [time-nuts] Locked onto LORAN 8970 GRI Monday AM

 Hello Bill,

 I have no real idea. I can not DF at this time. Antenna is an omni.

 I suspect the FS700 receiver looks at GRI data and placement within 
 the waveform and goes to a look up table in firmware to tell me the 
 supposed location to the LORAN plan 10 years ago.

 Only thing that may be possible is the RX signal strengths are 
 different for master and slave, so they may be physically separated or 
 their TX RF is from one location at different power levels.

 It will be interesting what your contact at Wildwood (NJ) has to say.

 Stan, W1LE   Cape Cod


 On 2/5/2013 1:06 PM, Bill Riches wrote:
  OK Stan,
 
  What stations are you receiving - not GRI numbers but locations!
 
  Bill Riches
  Cape May
 
  -

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Re: [time-nuts] Loran again

[Bill Riches]

Anyone locking on Wildwood, NJ - they are still fired up.

Bill, WA2DVU
Cape May


89700 dana and the srs700 has been locked for 10 hours plus. Looking pretty
good comparing RB adjusted to gps and 20ns drift  will be at least 42
minutes. But just relooked at the drift and it may be much longer. SN in
Boston 49db gain 33db margin.
HP 3801 is warming up for a direct comparison.
Regards
Paul
WB8TSL


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Re: [time-nuts] Loran again

[Bill Riches]

Greetings All,

Loran station at Wildwood, NJ is up at 2118 EST on 100 KHZ.   I guess they
are running surveys again.  I am located 3 miles NW of Wildwood Crest NJ
where the station is located.

73,

Bill, WA2DVU
Cape May Court House, NJ

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Rich and Marcia Putz
Sent: Thursday, January 31, 2013 7:01 PM
To: time-nuts@febo.com
Subject: [time-nuts] Loran again

Hi all;

I'm hearing Loran C signals @ 7:00 pm EST hear northern Indiana this
evening. Anyone else?

Rich

W9ENG
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Re: [time-nuts] Loran again

[Bill Riches]

This link may work.

http://www.insidegnss.com/node/2992

73,

Bill WA2DVU

Greetings All,

Loran station at Wildwood, NJ is up at 2118 EST on 100 KHZ.   I guess they
are running surveys again.  I am located 3 miles NW of Wildwood Crest NJ
where the station is located.

73,

Bill, WA2DVU
Cape May Court House, NJ

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Rich and Marcia Putz
Sent: Thursday, January 31, 2013 7:01 PM
To: time-nuts@febo.com
Subject: [time-nuts] Loran again

Hi all;

I'm hearing Loran C signals @ 7:00 pm EST hear northern Indiana this
evening. Anyone else?

Rich

W9ENG
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Re: [time-nuts] Loran

[Bill Riches]

Nothing going on in Cape May for a while - I don't know if they are done
testing.

Bill WA2DVU
Cape May, NJ

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Mike Garvey
Sent: Friday, November 30, 2012 3:25 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Loran


Might be these guys; this abstract is from the Precision Time and Time
Interval (PTTI) Meeting which took place in Reston, VA during this past
week. 

There will be a follow-up manuscript.

Mike 

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Thursday, November 29, 2012 6:35 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Loran

Rich
Did not see anyone respond. Are you still hearing the signal?
Paul
WB8TSL

On Mon, Nov 26, 2012 at 6:59 PM, Rich and Marcia Putz rp...@bnin.netwrote:

 Hi all;

 I 'm hearing Loran C signals here in northern Indiana this evening, I 
 guessing from New Jersey. Anyone else hearing these?

 Rich

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Re: [time-nuts] Time and frequency article

[Bill Riches]

In the link that Simon mentions the Costas loop is discussed.  In 1956 when
I was 14 and a SWL listener there was a AM technical net on 75 meters.
Every Sunday afternoon there was a visiting engineer ham or otherwise giving
a lecture.  I remember John giving his on a DSB process that he was working
with.  Little did I know that history was being made.

73,

Bill, WA2DVU
Cape May, NJ

Subject: [time-nuts] Time and frequency article

You can find it at

http://www.ecnmag.com/blogs/2012/11/its-about-time-timing-and-frequency-issu
es-engineering

Simon

 



Engineering is the art of making what you want from what you can get at a
profit.
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Re: [time-nuts] Up And Running

[Bill Riches]

Nice job George

73,

Bill, WA2DVU
Cape May, NJ




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Re: [time-nuts] HP 3586B Selective Level Meter

[Bill Riches]

Strange - email me a pic of the hole you are trying to plug into.

bill.ric...@verizon.net

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Chuck Forsberg WA7KGX N2469R
Sent: Thursday, July 26, 2012 6:58 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] HP 3586B Selective Level Meter

I ordered a BCJ-VWP adapter from Markertek.
A week and $18 later it shows up but does not fit my 3586B.
It is too fat to go into the connector on the HP, and the center pin is way
too fat..


On 07/19/2012 04:48 AM, Bill Riches wrote:
 Purchase the Canare BCJ-VWP adapter from Martertech or other suppliers.

 Bill Riches, WA2DVU
 Cape May, NJ

-- 
Chuck Forsberg WA7KGX N2469R c...@omen.com   www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
   Omen Technology Inc  The High Reliability Software
10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430




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Re: [time-nuts] HP 3586 Questions

[Bill Riches]

I did install a bnc connector for input - pain - it took a few hours.  Save
yourself a lot of grief and purchase a Canare bcj-vwp bnc adapter from
Markertech or others.  Works fine.

Bill Riches, WA2DVU

Now that I have my new [30 year old] HP 3586 making measurements over the
GPIB bus I have a few questions.

Setting AVErage makes measurements take about three seconds.
Is there a way to control the number of samples averaged?

How difficult is it to open up the 3586 to replace the input connector with
a BNC connector?

Is there a way to update and/or hack the firmware?  Is source code
available?

-- 
Chuck Forsberg WA7KGX N2469R c...@omen.com   www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
   Omen Technology Inc  The High Reliability Software
10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430


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Re: [time-nuts] HP 3586B Selective Level Meter

[Bill Riches]

Purchase the Canare BCJ-VWP adapter from Martertech or other suppliers.

Bill Riches, WA2DVU
Cape May, NJ

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Chuck Forsberg WA7KGX N2469R
Sent: Thursday, July 19, 2012 2:22 AM
To: time-nuts
Subject: [time-nuts] HP 3586B Selective Level Meter

Got one of these massive (by today's standards) beasts the other day.
It has the option 003.  Quite the light show when it powers up.

I have its external reference daisy chained with a radio and two other
instruments sucking 10 MHz from my Thunderbolt.

I have not decided what to do with the ATT front panel input.
Should I get a BNC adapter for it?  Or replace it with a BNC connector?

-- 
Chuck Forsberg WA7KGX N2469R c...@omen.com   www.omen.com
Developer of Industrial ZMODEM(Tm) for Embedded Applications
   Omen Technology Inc  The High Reliability Software
10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430


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[time-nuts] Antenna for t-bolt

[Bill Riches]

Hi guys,

I have asked this question several times over the past few weeks and get no
answer.  Have I been ostracized??!!

Question is that I am looking for suggestions for GPS antenna for t-bolt.
The antenna that I am using now is a no name and I not know where it came
from!  Wonder if a Garman GA-30 will work?

73,

Bill, WA2DVU
Cape May, NJ





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[time-nuts] pc loran c program

[Bill Riches]

Are there any pc programs that can decode Loran C id's?

73,

Bill, WA2DVU
Cape May, NJH



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Re: [time-nuts] LORAN C on the air 1400 EST may have been on all day

[Bill Riches]

Cape may is up as of 1600 EDST
73,

Bill, WA2DVU
Cape May, NJ



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Re: [time-nuts] LEA-6T Group buy

[Bill Riches]

http://www.u-blox.com/images/downloads/Product_Docs/LEA-6_DataSheet_%28GPS.G
6-HW-09004%29.pdf

Regards,

Bill Riches, WA2DVU
Cape May, NJ

-

I have not been able to locate a spec sheet for there.  Do you have a
link?   Or maybe you could say how these are improved over the M12M?
-- 

Chris Albertson
Redondo Beach, California



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Re: [time-nuts] LORAN C 89700 dropped carriers at 1615 EST after a solid 3 days

[Bill Riches]

Hi Paul and others,

Please give your QTH when posting.  Any ids would be appreciated.  I have
been talking with one of the ETs at the Wildwood NJ site.  Film at 11.

73,

Bill, WA2DVU
Cape May, NJ

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Thursday, March 22, 2012 4:49 PM
To: Time-nuts; paul swed
Subject: [time-nuts] LORAN C 89700 dropped carriers at 1615 EST after a
solid 3 days

Best run yet, 3 solid days of operation and I was able to log various local
references as compared to a HP3801 and Tbolt.
Only 2 stations generally on the air. 89700 Master and X, but an
unidentified one came up for a short bit in the 4th position Regards Paul
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[time-nuts] Cape May 100 Khz

[Bill Riches]

Cape May is up at 2000Z

73,

Bill WA2DVU




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Re: [time-nuts] LORAN-C Reception on Cape Cod

[Bill Riches]

Seems that Cape May NJ is on also - is that part of the chain?

73, Bill WA2DVU

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Stan, W1LE
Sent: Tuesday, March 20, 2012 10:45 AM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] LORAN-C Reception on Cape Cod

Hello The Net: (especially the LORAN-C listeners)

Right now my SRS FS700 Loran-C receiver is locked onto a signal.

GRI 89700 microseconds   station: AUTO (M)
location: DANA, IL  USA

Receiver locked
Tracking Loran-C signal

Receiver gain: 77dB
Noise margin:  39 dB

Loran Freq offset:  -1.1E-10
Phase: -17.9 deg

Stations found: (ident: Amp in dB)
M59*   X56

Time since lock:   0:21:40  ( had lock overnight, but with an error so I 
did a new search)
Length last unlock:  0:10:42

Signal status:  a r b n o

I am using the standard SRS active whip antenna about 7' above ground in the
back yard.
Receiver firmware is 1.19

As time permits I will compare the Loran-C to the T'Bolt GPS/DO, with the
Tracor 527E.

It is nice to have Loran-C signal to play with.
The Nantucket Loran-C station was a bout 40 miles away. Almost a Cs
reference in my shack.


Stan, W1LE Cape CodFN41sr



XXXx

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Re: [time-nuts] (no subject)

[Bill Riches]

100 Khz is s/9 in Cape May, NJ.

73,

Bill, WA2DVU
Cape May,NJ



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Re: [time-nuts] (no subject)

[Bill Riches]

OOOPS - had wrong antenna connected - sig is 20/9 and is coming from the
only station that has been doing tests. It is located at the southern end of
Wildwood New Jersey, the old USCG engineering station. About 5 miles as the
crow flies from my qth.

73,

Bill

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Bill Riches
Sent: Monday, March 19, 2012 9:08 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] (no subject)

100 Khz is s/9 in Cape May, NJ.

73,

Bill, WA2DVU
Cape May,NJ



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Re: [time-nuts] LORAN C in New Jersey??

[Bill Riches]

Again - test transmissions are from the USCG site at Wildwood Crest, NJ.
That was the old USCG engineering station which has been dismantled and the
only thing left is the 600+ foot tower and loran transmitter that was used
for engineering tests and as a back up if needed.  I am 7 miles from the
site and last week it was putting in a 20 - 30/9 sig at my qth.

73,

Bill Riches, WA2DVU
Cape May, NJ 



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Re: [time-nuts] military frequency standard pin out??

[Bill Riches]

I used to rebuild these units many years ago and they were quite a good 
oscillator - these units would be good for a few parts in 10-9 and 10-8. 

73,

Bill, WA2DVU


Paul A. Cianciolo paulc at snet.net
The cover has the layout of the parts.  The connector has 6 coax 
outputs into a D type connector.

+
It sounds like the R-1051/URR receiver frequency standard. There is 
some info
on 
repairing it here: 
http://www.jamminpower.com/PDF/Navships%200967-034-2000.pdf

Yes, it is. For a picture look here:
http://www.jamminpower.com/main/r1051.html

Should you be unable to download the manuals, I could send you at least the 
schematic diagram and component location of the Freq. Std.
I have one of these oscillators, and years ago I used  18VDC for testing. It is 
rated at 10E-8 per day, and has 5MHz, 1MHz and 10 MHz  plus 2x500KHz outputs. 
As you may have seen, it was used on a radio.

Antonio I8IOV





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Re: [time-nuts] military frequency standard pin out??

[Bill Riches]

They were dogs though - I worked on mine for repairing 1051 rx - seemed
failure rate was more than 50 %  - took 2 or three to make a good unit! But
when you made one work they were quite accurate considering their age.

73,

Bill, WA2DVU


Hi Bob,

Yes.. that is what I am trying to find out.   But I don't want to chance it
till I know for sure what the power requirements are.
Thanks for the heads up though, I did not realize the bad rep these had.




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Re: [time-nuts] Fwd: FE-5680A Contact FEI

[Bill Riches]

Good points made - no income for the company, However on the other side of
the coin - look at Agilient having available all of the old HP manuals for
download even though there is no income to them.  I wonder if it was a
requirement of them to supply HP manuals when they absorbed HP.

I just purchased a new HP Pavilion laptop and was surprised to see that you
can download a service manual from HP with part numbers and it has
disassembly instructions - don't know of any other mfgs that do that.  Of
course HP computer company does not have any connection with the original HP
- or do they...

73,

Bill Riches, WA2DVU
Cape May, NJ 

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Jim Lux
Sent: Friday, February 17, 2012 9:43 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Fwd: FE-5680A Contact FEI

On 2/17/12 5:27 AM, paul swed wrote:
 The used market makes no difference to them. No revenue stream.



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Re: [time-nuts] FE-5680A Contact FEI

[Bill Riches]

Just curious,

Has anyone on this list actually contacted FEI and enquired about a
schematic or other info about our 5680 units?  They are still being sold by
them.

73,

Bill Riches, WA2DVU
Cape May, NJ




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Re: [time-nuts] HP5334B with 10544 OCXO

[Bill Riches]

10544 is cool - earlier version than the 10811.  Just make sure that the
unit is getting warm - some of them have had oven controller problems - but
haven't we all??!!

Regards,

Bill Riches
WA2DVU

-.
Hello.

I recently bough an HP-5334B counter with option 010 from the big E.  A
Google search seems to indicate the OCXO should be a 10811 type OCXO but
mine has a type 10544.

Other than taking longer to warm up does anybody see any problems with this?
Basic testing shows the unit seems to work OK.  It is reading 1.7 Hz low
compared to my Thunderbolt at 10 MHz - I have not tried adjusting the
trimmer on the 10544 yet.

Comments and thoughts appreciated.

Regards.

Mark.
VE6NTP

.



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Re: [time-nuts] FE-5680A adjustment screw?

[Bill Riches]

it does nothing - not connected - you might look at the 5680 archives - this
and a bunch of other info is listed ad nauseum about the 5680.

73,

Bill, WA2DVU
Cape May, NJ

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Robert Benward
Sent: Tuesday, January 17, 2012 10:01 PM
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] FE-5680A adjustment screw?

Hi all,
Anyone know what the little adjustment hole is on the side of the FE-5680A?
Is this a frequency adjustment?  I tried adjusting it but nothing happened.
Was the adjustment range too small to see a change on a counter?




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Re: [time-nuts] FE-5680A adjustment screw?

[Bill Riches]

I was looking at them also but thought if I tried to use them the soot would
have been let out of something!!

73,

Bill
WA2DVU

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Chuck Forsberg WA7KGX N2469R
Sent: Wednesday, January 18, 2012 9:13 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE-5680A adjustment screw?

The circuit board near the 9 pin connector has a number of pads
which appear to be option jumper sites.   If so it would be nice to
know what they do just think of the possibilities..
.



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Re: [time-nuts] FE-5680A Mechanical Question

[Bill Riches]

they are screws - real small torx head

Bill Riches
Cape May, NJ


Should I ever have time to pursue the Rb unit, what happens when I 'drill
out' all the rivets that mount the unit to the PCB that it arrived on?  Any
reason to keep it on the PCB?

 

Does the bottom cover come off?  Will I need to replace the rivets with
something else to keep the bottom cover on?

 

Thanks in advance.

 

Joe

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Re: [time-nuts] Power supply for 'Bay FE-5680A?

[Bill Riches]

I don't know what all the grief is about a power supply to run the 5680
units.  I have three 5380/Trimble GPs units in various locations being
powered by Mean Well power supplies from Mouser.  # 709-T40C for about 50
bucks - 75 bucks for one with more current.  It is a switching ps but seems
clean in our lab.  For a hundred bucks you have a RB standard. Spend the
bucks!!

73,

Bill, WA2DVU
Cape May, NJ



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Re: [time-nuts] FE 5680a 3pay 36.89 includes shipping. Finally ordered one

[Bill Riches]

Noticed that one of my 5680 units was a bit unstable at times.  Reglued the
crystal back on to the board and it it happy!

73,

Bill, WA2DVU
Cape May, NJ
ons there.


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Re: [time-nuts] FE-5680A performance

[Bill Riches]

Hi Said,

Excellent plots - what program/ how are you producing the plots?

73,

Bill, WA2DVU
Cape May, NJ

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of saidj...@aol.com
Sent: Wednesday, January 04, 2012 4:18 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] FE-5680A performance

Here is a set of performance plots for the FE5680A that we had  measured
before.
 
Performance has improved significantly, ADEV is now in the xE-012's.
 
Phase noise and spurs are worse than originally reported, they kind of suck.
 
Frequency over time looks quite nice though, definitely quite useful as a
frequency reference.
 
bye,
Said


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Re: [time-nuts] FE-5680A performance

[Bill Riches]

Ah ha!!  I was hoping that it was a simple excel procedure!!  Nice piece
of gear.

Regards

Bill 

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Said Jackson
Sent: Wednesday, January 04, 2012 7:45 PM
To: Discussion of precise time and frequency measurement
Cc: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FE-5680A performance

Hello Bill,

They are printed to a postscript file by the TSC5125A using the print
button on the tsc.

After FTP download I use Acrobat Professional to convert the PS file to PDF.

Results in good quality plots with small file size.

Bye,
Said

Sent from my iPad

On Jan 4, 2012, at 15:25, Bill Riches bill.ric...@verizon.net wrote:

 Hi Said,
 
 Excellent plots - what program/ how are you producing the plots?
 
 73,
 
 Bill, WA2DVU
 Cape May, NJ
 
 -Original Message-
 From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
 Behalf Of saidj...@aol.com
 Sent: Wednesday, January 04, 2012 4:18 PM
 To: time-nuts@febo.com
 Subject: Re: [time-nuts] FE-5680A performance
 
 Here is a set of performance plots for the FE5680A that we had  measured
 before.
 
 Performance has improved significantly, ADEV is now in the xE-012's.
 
 Phase noise and spurs are worse than originally reported, they kind of
suck.
 
 Frequency over time looks quite nice though, definitely quite useful as a
 frequency reference.
 
 bye,
 Said
 
 
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Re: [time-nuts] FE 5680a Schematic etc.

[Bill riches]

look on this list about a week ago.  i wrote up how I did it. very easy.  my 
unit is holding at a few parts to the -11.  sorry i do not have file on ipad.  

bill wa2dvu

Sent from my iPad

On Dec 29, 2011, at 6:42 AM, Azelio Boriani azelio.bori...@screen.it wrote:

 Someone here has pointed out how to connect to the C-field control... I
 can't remember when, must serach the archive. It wasn't long ago because
 all the FE5680 stuff is very recent. I don't think that a schematic of the
 FEI Rbs will be ever available officially.
 
 On Thu, Dec 29, 2011 at 10:20 AM, Chuck Forsberg WA7KGX N2469R c...@omen.com
 wrote:
 
 I'm afraid I wasn't clear.  I need a schematic for the FE-5680A
 so I can add an analog freq control to it.
 
 On 12/29/2011 12:59 AM, Azelio Boriani wrote:
 
 For some notes on how to connect an external oscillator to the TBolt see:
 
 http://www.thegleam.com/ke5fx/**tbolt.htmhttp://www.thegleam.com/ke5fx/tbolt.htm
 
 
 On Thu, Dec 29, 2011 at 2:15 AM, Chuck Forsberg WA7KGX N2469R
 c...@omen.comwrote:
 
 Is there a schematic available?
 
 I have a Tbolt that came with a failed oscillator that might
 enjoy whipping an FE5680A into shape.  I'm thinking along
 the lines of a multi megohm resistor connecting the Tbolt
 DAC output with some point in the C field regulator.
 
 --
 Chuck Forsberg WA7KGX N2469R c...@omen.com   www.omen.com
 Developer of Industrial ZMODEM(Tm) for Embedded Applications
 Omen Technology Inc  The High Reliability Software
 10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430
 
 
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 https://www.febo.com/cgi-bin/https://www.febo.com/cgi-bin/**
 mailman/listinfo/time-nutshtt**ps://www.febo.com/cgi-bin/**
 mailman/listinfo/time-nutshttps://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
 
 and follow the instructions there.
 
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 and follow the instructions there.
 
 
 --
 Chuck Forsberg WA7KGX N2469R c...@omen.com   www.omen.com
 Developer of Industrial ZMODEM(Tm) for Embedded Applications
 Omen Technology Inc  The High Reliability Software
 10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430
 
 
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Re: [time-nuts] Adding adjustment pot to 5680

[Bill Riches]

As has been mentioned by Pete and others the majority of the inexpensive
5680 units can only be adjusted for frequency by inputting rs232 info.  I am
experimenting with a simple mod to add a fx adjust pot to my unit.  I
removed the unconnected dummy pot and glued a miniature 100 k pot upside
down in the area where the original pot was.  Its connections are on the top
of the pot.  Cold side of pot went to ground, hot side of pot went to output
of 8 volt regulator through 1 k resistor. Wiper goes through a 100k resistor
to pin 5 of the  chip next to the ribbon connector. (To find pin 5 have unit
positioned with db9 connector at upper left, ic area will be in lower right.
Pins 1 through 7 are between the chip and the ribbon connector - pin 1 is at
the extreme right next to the marking on the chip - count left to pin 5!  I
got my 8 volts from the 8 volt regulator that is the first xsistor of the
two that are mounted on the vertical heatsink. The third pin is 8 volts
output.  Pins are counting down from db 9 connector area.   

Three hours after doing this mod my unit is about 5x10-12 high. The voltage
on pin 5 is 3.52 volts.  I have my thunderbolt 10 mhz output triggering my
465, the 10mhz from 5680 going to vertical input, time base set to .1 usec
and the x10 mult on giving me .01 usec per div.  With a stopwatch I time the
time it takes for the trace to move one division. I divide the seconds
measured and divide that into 1 to the minus 8th and get the offset.  in
this case 1 to the minus 8th divided by 195 seconds gives me about 5 parts
in 10 to the 11th.  The trace is moving to the left which means the osc is
high.  

I would appreciate any of the 5680 gurus to go over my math and what I have
done and let me know if I am all wet!!  Thanks to all of the threads on this
unit that have been on this list.

73,


Bill Riches, Wa2dvu
Cape May, NJ




 

-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of saidj...@aol.com
Sent: Thursday, December 22, 2011 1:39 PM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Using Thunderbolt to Discipline FE 5680A?

Hi there,
 
maybe this has already been discussed here.. There is a small hole on the  
side of the unit with a small trim-pot visible through the hole. Does anyone

 know if this is an analog frequency adjustment?
 
If it is, maybe that trimpot connection can be used as disciplining  input..
 
Thanks,
Said
 
 
In a message dated 12/22/2011 09:20:57 Pacific Standard Time,  
albertson.ch...@gmail.com writes:

I think  the FE-5680A has to course of adjustment to be used in the
fast control  loop inside the t-bolt


Chris Albertson
Redondo Beach,  California


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